diff --git a/libraries/metrics/memory.js b/libraries/metrics/memory.js
index aa8f667fb7..73dc18cc50 100644
--- a/libraries/metrics/memory.js
+++ b/libraries/metrics/memory.js
@@ -87,13 +87,13 @@ module.exports = MemoryMonitor = {
     Metrics.gauge('memory.gc-interval', gcInterval)
     // Metrics.gauge("memory.cpu-time-bucket", CpuTimeBucket)
 
-    logger.log(mem, 'process.memoryUsage()')
+    logger.debug(mem, 'process.memoryUsage()')
 
     if (global.gc != null && readyToGc()) {
       const gcTime = executeAndTime(global.gc).toFixed(2)
       const memAfterGc = inMegaBytes(process.memoryUsage())
       const deltaMem = updateMemoryStats(memBeforeGc, memAfterGc)
-      logger.log(
+      logger.debug(
         {
           gcTime,
           memBeforeGc,
diff --git a/libraries/metrics/mongodb.js b/libraries/metrics/mongodb.js
index 130a5d07fa..bc0a910366 100644
--- a/libraries/metrics/mongodb.js
+++ b/libraries/metrics/mongodb.js
@@ -53,7 +53,7 @@ module.exports = {
         const start = new Date()
         return _method.call(this, dbCommand, options, function () {
           timer.done()
-          logger.log(
+          logger.debug(
             {
               query: dbCommand.query,
               query_type: type,
@@ -89,7 +89,7 @@ module.exports = {
         const start = new Date()
         return _method.call(this, ns, ops, options, function () {
           timer.done()
-          logger.log(
+          logger.debug(
             {
               query: ops[0].q,
               query_type: type,
diff --git a/libraries/metrics/test/unit/js/timeAsyncMethodTests.js b/libraries/metrics/test/unit/js/timeAsyncMethodTests.js
index 15bd5fc194..f39d257408 100644
--- a/libraries/metrics/test/unit/js/timeAsyncMethodTests.js
+++ b/libraries/metrics/test/unit/js/timeAsyncMethodTests.js
@@ -130,10 +130,10 @@ describe('timeAsyncMethod', function () {
 
   describe('when a logger is supplied', function () {
     beforeEach(function () {
-      return (this.logger = { log: sinon.stub() })
+      return (this.logger = { debug: sinon.stub(), log: sinon.stub() })
     })
 
-    return it('should also call logger.log', function (done) {
+    return it('should also call logger.debug', function (done) {
       this.timeAsyncMethod(
         this.testObject,
         'nextNumber',
@@ -145,7 +145,7 @@ describe('timeAsyncMethod', function () {
         expect(result).to.equal(3)
         expect(this.TimerConstructor.callCount).to.equal(1)
         expect(this.Timer.done.callCount).to.equal(1)
-        expect(this.logger.log.callCount).to.equal(1)
+        expect(this.logger.debug.callCount).to.equal(1)
         return done()
       })
     })
diff --git a/libraries/metrics/timeAsyncMethod.js b/libraries/metrics/timeAsyncMethod.js
index beaba83564..3bf0eb40d6 100644
--- a/libraries/metrics/timeAsyncMethod.js
+++ b/libraries/metrics/timeAsyncMethod.js
@@ -36,7 +36,7 @@ module.exports = function (obj, methodName, prefix, logger) {
 
     if (callback == null || typeof callback !== 'function') {
       if (logger != null) {
-        logger.log(
+        logger.debug(
           `[Metrics] expected wrapped method '${methodName}' to be invoked with a callback`
         )
       }
@@ -74,7 +74,7 @@ module.exports = function (obj, methodName, prefix, logger) {
               }
             }
           } catch (error) {}
-          logger.log(
+          logger.debug(
             { key, args: loggableArgs, elapsedTime },
             '[Metrics] timed async method call'
           )
diff --git a/services/chat/app.js b/services/chat/app.js
index f7d8167e61..d0f1a6dba4 100644
--- a/services/chat/app.js
+++ b/services/chat/app.js
@@ -16,7 +16,7 @@ if (!module.parent) {
           logger.fatal({ err }, `Cannot bind to ${host}:${port}. Exiting.`)
           process.exit(1)
         }
-        logger.info(`Chat starting up, listening on ${host}:${port}`)
+        logger.debug(`Chat starting up, listening on ${host}:${port}`)
       })
     })
     .catch(err => {
diff --git a/services/chat/app/js/Features/Messages/MessageHttpController.js b/services/chat/app/js/Features/Messages/MessageHttpController.js
index 9c9815ed5e..e05dacf611 100644
--- a/services/chat/app/js/Features/Messages/MessageHttpController.js
+++ b/services/chat/app/js/Features/Messages/MessageHttpController.js
@@ -22,7 +22,7 @@ async function sendThreadMessage(req, res) {
 
 async function getAllThreads(req, res) {
   const { projectId } = req.params
-  logger.log({ projectId }, 'getting all threads')
+  logger.debug({ projectId }, 'getting all threads')
   const rooms = await ThreadManager.findAllThreadRooms(projectId)
   const roomIds = rooms.map(r => r._id)
   const messages = await MessageManager.findAllMessagesInRooms(roomIds)
@@ -33,21 +33,21 @@ async function getAllThreads(req, res) {
 async function resolveThread(req, res) {
   const { projectId, threadId } = req.params
   const { user_id: userId } = req.body
-  logger.log({ userId, projectId, threadId }, 'marking thread as resolved')
+  logger.debug({ userId, projectId, threadId }, 'marking thread as resolved')
   await ThreadManager.resolveThread(projectId, threadId, userId)
   res.sendStatus(204)
 }
 
 async function reopenThread(req, res) {
   const { projectId, threadId } = req.params
-  logger.log({ projectId, threadId }, 'reopening thread')
+  logger.debug({ projectId, threadId }, 'reopening thread')
   await ThreadManager.reopenThread(projectId, threadId)
   res.sendStatus(204)
 }
 
 async function deleteThread(req, res) {
   const { projectId, threadId } = req.params
-  logger.log({ projectId, threadId }, 'deleting thread')
+  logger.debug({ projectId, threadId }, 'deleting thread')
   const roomId = await ThreadManager.deleteThread(projectId, threadId)
   await MessageManager.deleteAllMessagesInRoom(roomId)
   res.sendStatus(204)
@@ -56,7 +56,7 @@ async function deleteThread(req, res) {
 async function editMessage(req, res) {
   const { content, userId } = req.body
   const { projectId, threadId, messageId } = req.params
-  logger.log({ projectId, threadId, messageId, content }, 'editing message')
+  logger.debug({ projectId, threadId, messageId, content }, 'editing message')
   const room = await ThreadManager.findOrCreateThread(projectId, threadId)
   const found = await MessageManager.updateMessage(
     room._id,
@@ -73,7 +73,7 @@ async function editMessage(req, res) {
 
 async function deleteMessage(req, res) {
   const { projectId, threadId, messageId } = req.params
-  logger.log({ projectId, threadId, messageId }, 'deleting message')
+  logger.debug({ projectId, threadId, messageId }, 'deleting message')
   const room = await ThreadManager.findOrCreateThread(projectId, threadId)
   await MessageManager.deleteMessage(room._id, messageId)
   res.sendStatus(204)
@@ -81,12 +81,12 @@ async function deleteMessage(req, res) {
 
 async function destroyProject(req, res) {
   const { projectId } = req.params
-  logger.log({ projectId }, 'destroying project')
+  logger.debug({ projectId }, 'destroying project')
   const rooms = await ThreadManager.findAllThreadRoomsAndGlobalThread(projectId)
   const roomIds = rooms.map(r => r._id)
-  logger.log({ projectId, roomIds }, 'deleting all messages in rooms')
+  logger.debug({ projectId, roomIds }, 'deleting all messages in rooms')
   await MessageManager.deleteAllMessagesInRooms(roomIds)
-  logger.log({ projectId }, 'deleting all threads in project')
+  logger.debug({ projectId }, 'deleting all threads in project')
   await ThreadManager.deleteAllThreadsInProject(projectId)
   res.sendStatus(204)
 }
@@ -105,7 +105,7 @@ async function _sendMessage(clientThreadId, req, res) {
       .status(400)
       .send(`Content too long (> ${MAX_MESSAGE_LENGTH} bytes)`)
   }
-  logger.log(
+  logger.debug(
     { clientThreadId, projectId, userId, content },
     'new message received'
   )
@@ -137,7 +137,7 @@ async function _getMessages(clientThreadId, req, res) {
   } else {
     limit = DEFAULT_MESSAGE_LIMIT
   }
-  logger.log(
+  logger.debug(
     { limit, before, projectId, clientThreadId },
     'get message request received'
   )
@@ -146,13 +146,13 @@ async function _getMessages(clientThreadId, req, res) {
     clientThreadId
   )
   const threadObjectId = thread._id
-  logger.log(
+  logger.debug(
     { limit, before, projectId, clientThreadId, threadObjectId },
     'found or created thread'
   )
   let messages = await MessageManager.getMessages(threadObjectId, limit, before)
   messages = MessageFormatter.formatMessagesForClientSide(messages)
-  logger.log({ projectId, messages }, 'got messages')
+  logger.debug({ projectId, messages }, 'got messages')
   res.status(200).send(messages)
 }
 
diff --git a/services/clsi/app.js b/services/clsi/app.js
index bd1e9419cf..623fa9b3f2 100644
--- a/services/clsi/app.js
+++ b/services/clsi/app.js
@@ -258,13 +258,13 @@ Settings.processTooOld = false
 if (Settings.processLifespanLimitMs) {
   Settings.processLifespanLimitMs +=
     Settings.processLifespanLimitMs * (Math.random() / 10)
-  logger.info(
+  logger.debug(
     'Lifespan limited to ',
     Date.now() + Settings.processLifespanLimitMs
   )
 
   setTimeout(() => {
-    logger.log('shutting down, process is too old')
+    logger.debug('shutting down, process is too old')
     Settings.processTooOld = true
   }, Settings.processLifespanLimitMs)
 }
@@ -276,10 +276,10 @@ function runSmokeTest() {
     smokeTest.lastRunSuccessful() &&
     Date.now() - CompileController.lastSuccessfulCompile < INTERVAL / 2
   ) {
-    logger.log('skipping smoke tests, got recent successful user compile')
+    logger.debug('skipping smoke tests, got recent successful user compile')
     return setTimeout(runSmokeTest, INTERVAL / 2)
   }
-  logger.log('running smoke tests')
+  logger.debug('running smoke tests')
   smokeTest.triggerRun(err => {
     if (err) logger.error({ err }, 'smoke tests failed')
     setTimeout(runSmokeTest, INTERVAL)
@@ -300,7 +300,7 @@ app.get('/smoke_test_force', (req, res) => smokeTest.sendNewResult(res))
 
 app.use(function (error, req, res, next) {
   if (error instanceof Errors.NotFoundError) {
-    logger.log({ err: error, url: req.url }, 'not found error')
+    logger.debug({ err: error, url: req.url }, 'not found error')
     return res.sendStatus(404)
   } else if (error.code === 'EPIPE') {
     // inspect container returns EPIPE when shutting down
@@ -362,19 +362,19 @@ const loadHttpServer = express()
 
 loadHttpServer.post('/state/up', function (req, res, next) {
   STATE = 'up'
-  logger.info('getting message to set server to down')
+  logger.debug('getting message to set server to down')
   return res.sendStatus(204)
 })
 
 loadHttpServer.post('/state/down', function (req, res, next) {
   STATE = 'down'
-  logger.info('getting message to set server to down')
+  logger.debug('getting message to set server to down')
   return res.sendStatus(204)
 })
 
 loadHttpServer.post('/state/maint', function (req, res, next) {
   STATE = 'maint'
-  logger.info('getting message to set server to maint')
+  logger.debug('getting message to set server to maint')
   return res.sendStatus(204)
 })
 
@@ -407,7 +407,7 @@ if (!module.parent) {
     if (error) {
       logger.fatal({ error }, `Error starting CLSI on ${host}:${port}`)
     } else {
-      logger.info(`CLSI starting up, listening on ${host}:${port}`)
+      logger.debug(`CLSI starting up, listening on ${host}:${port}`)
     }
   })
 
@@ -415,14 +415,16 @@ if (!module.parent) {
     if (error != null) {
       throw error
     }
-    return logger.info(`Load tcp agent listening on load port ${loadTcpPort}`)
+    return logger.debug(`Load tcp agent listening on load port ${loadTcpPort}`)
   })
 
   loadHttpServer.listen(loadHttpPort, host, function (error) {
     if (error != null) {
       throw error
     }
-    return logger.info(`Load http agent listening on load port ${loadHttpPort}`)
+    return logger.debug(
+      `Load http agent listening on load port ${loadHttpPort}`
+    )
   })
 }
 
diff --git a/services/clsi/app/js/CommandRunner.js b/services/clsi/app/js/CommandRunner.js
index 2dce56a942..61d58ddd14 100644
--- a/services/clsi/app/js/CommandRunner.js
+++ b/services/clsi/app/js/CommandRunner.js
@@ -14,7 +14,7 @@ if ((Settings.clsi != null ? Settings.clsi.dockerRunner : undefined) === true) {
 } else {
   commandRunnerPath = './LocalCommandRunner'
 }
-logger.info({ commandRunnerPath }, 'selecting command runner for clsi')
+logger.debug({ commandRunnerPath }, 'selecting command runner for clsi')
 const CommandRunner = require(commandRunnerPath)
 
 module.exports = CommandRunner
diff --git a/services/clsi/app/js/CompileController.js b/services/clsi/app/js/CompileController.js
index e570838051..dcf56d695b 100644
--- a/services/clsi/app/js/CompileController.js
+++ b/services/clsi/app/js/CompileController.js
@@ -72,7 +72,7 @@ module.exports = CompileController = {
                 status = `validation-${error.validate}`
               } else if (error != null ? error.timedout : undefined) {
                 status = 'timedout'
-                logger.log(
+                logger.debug(
                   { err: error, project_id: request.project_id },
                   'timeout running compile'
                 )
@@ -245,7 +245,7 @@ module.exports = CompileController = {
     if (image && !isImageNameAllowed(image)) {
       return res.status(400).send('invalid image')
     }
-    logger.log({ image, file, project_id }, 'word count request')
+    logger.debug({ image, file, project_id }, 'word count request')
 
     return CompileManager.wordcount(
       project_id,
diff --git a/services/clsi/app/js/CompileManager.js b/services/clsi/app/js/CompileManager.js
index 1cf362cd1f..cf61f16ded 100644
--- a/services/clsi/app/js/CompileManager.js
+++ b/services/clsi/app/js/CompileManager.js
@@ -69,7 +69,7 @@ function doCompile(request, callback) {
     COMPILE_TIME_BUCKETS
   )
   const timer = new Metrics.Timer('write-to-disk', 1, request.metricsOpts)
-  logger.log(
+  logger.debug(
     { projectId: request.project_id, userId: request.user_id },
     'syncing resources to disk'
   )
@@ -95,7 +95,7 @@ function doCompile(request, callback) {
         )
         return callback(error)
       }
-      logger.log(
+      logger.debug(
         {
           projectId: request.project_id,
           userId: request.user_id,
@@ -257,7 +257,7 @@ function doCompile(request, callback) {
                 Metrics.gauge('load-avg', loadavg[0])
               }
               const ts = timer.done()
-              logger.log(
+              logger.debug(
                 {
                   projectId: request.project_id,
                   userId: request.user_id,
@@ -498,7 +498,10 @@ function syncFromPdf(projectId, userId, page, h, v, imageName, callback) {
     if (error != null) {
       return callback(error)
     }
-    logger.log({ projectId, userId, page, h, v, stdout }, 'synctex pdf output')
+    logger.debug(
+      { projectId, userId, page, h, v, stdout },
+      'synctex pdf output'
+    )
     callback(null, SynctexOutputParser.parseEditOutput(stdout, baseDir))
   })
 }
@@ -561,7 +564,7 @@ function _runSynctex(projectId, userId, command, imageName, callback) {
 }
 
 function wordcount(projectId, userId, filename, image, callback) {
-  logger.log({ projectId, userId, filename, image }, 'running wordcount')
+  logger.debug({ projectId, userId, filename, image }, 'running wordcount')
   const filePath = `$COMPILE_DIR/${filename}`
   const command = [
     'texcount',
@@ -607,7 +610,7 @@ function wordcount(projectId, userId, filename, image, callback) {
               return callback(err)
             }
             const results = _parseWordcountFromOutput(stdout)
-            logger.log(
+            logger.debug(
               { projectId, userId, wordcount: results },
               'word count results'
             )
diff --git a/services/clsi/app/js/DockerRunner.js b/services/clsi/app/js/DockerRunner.js
index d876705c8d..f699ebf16e 100644
--- a/services/clsi/app/js/DockerRunner.js
+++ b/services/clsi/app/js/DockerRunner.js
@@ -10,7 +10,7 @@ const Path = require('path')
 const _ = require('lodash')
 
 const ONE_HOUR_IN_MS = 60 * 60 * 1000
-logger.info('using docker runner')
+logger.debug('using docker runner')
 
 function usingSiblingContainers() {
   return (
@@ -36,7 +36,7 @@ const DockerRunner = {
   ) {
     if (usingSiblingContainers()) {
       const _newPath = Settings.path.sandboxedCompilesHostDir
-      logger.log(
+      logger.debug(
         { path: _newPath },
         'altering bind path for sibling containers'
       )
@@ -85,14 +85,14 @@ const DockerRunner = {
 
     // logOptions = _.clone(options)
     // logOptions?.HostConfig?.SecurityOpt = "secomp used, removed in logging"
-    logger.log({ projectId }, 'running docker container')
+    logger.debug({ projectId }, 'running docker container')
     DockerRunner._runAndWaitForContainer(
       options,
       volumes,
       timeout,
       (error, output) => {
         if (error && error.statusCode === 500) {
-          logger.log(
+          logger.debug(
             { err: error, projectId },
             'error running container so destroying and retrying'
           )
@@ -118,7 +118,7 @@ const DockerRunner = {
   },
 
   kill(containerId, callback) {
-    logger.log({ containerId }, 'sending kill signal to container')
+    logger.debug({ containerId }, 'sending kill signal to container')
     const container = dockerode.getContainer(containerId)
     container.kill(error => {
       if (
@@ -193,7 +193,7 @@ const DockerRunner = {
           if (options != null && options.HostConfig != null) {
             options.HostConfig.SecurityOpt = null
           }
-          logger.log({ exitCode, options }, 'docker container has exited')
+          logger.debug({ exitCode, options }, 'docker container has exited')
           callbackIfFinished()
         })
       }
@@ -352,7 +352,7 @@ const DockerRunner = {
     callback = _.once(callback)
     const { name } = options
 
-    logger.log({ container_name: name }, 'starting container')
+    logger.debug({ container_name: name }, 'starting container')
     const container = dockerode.getContainer(name)
 
     function createAndStartContainer() {
@@ -412,7 +412,7 @@ const DockerRunner = {
         attachStartCallback()
       }
 
-      logger.log({ containerId }, 'attached to container')
+      logger.debug({ containerId }, 'attached to container')
 
       const MAX_OUTPUT = 1024 * 1024 // limit output to 1MB
       function createStringOutputStream(name) {
@@ -469,13 +469,13 @@ const DockerRunner = {
     let timedOut = false
     const timeoutId = setTimeout(() => {
       timedOut = true
-      logger.log({ containerId }, 'timeout reached, killing container')
+      logger.debug({ containerId }, 'timeout reached, killing container')
       container.kill(err => {
         logger.warn({ err, containerId }, 'failed to kill container')
       })
     }, timeout)
 
-    logger.log({ containerId }, 'waiting for docker container')
+    logger.debug({ containerId }, 'waiting for docker container')
     container.wait((error, res) => {
       if (error != null) {
         clearTimeout(timeoutId)
@@ -483,13 +483,13 @@ const DockerRunner = {
         return callback(error)
       }
       if (timedOut) {
-        logger.log({ containerId }, 'docker container timed out')
+        logger.debug({ containerId }, 'docker container timed out')
         error = new Error('container timed out')
         error.timedout = true
         callback(error)
       } else {
         clearTimeout(timeoutId)
-        logger.log(
+        logger.debug(
           { containerId, exitCode: res.StatusCode },
           'docker container returned'
         )
@@ -518,7 +518,7 @@ const DockerRunner = {
   },
 
   _destroyContainer(containerId, shouldForce, callback) {
-    logger.log({ containerId }, 'destroying docker container')
+    logger.debug({ containerId }, 'destroying docker container')
     const container = dockerode.getContainer(containerId)
     container.remove({ force: shouldForce === true, v: true }, error => {
       if (error != null && error.statusCode === 404) {
@@ -531,7 +531,7 @@ const DockerRunner = {
       if (error != null) {
         logger.error({ err: error, containerId }, 'error destroying container')
       } else {
-        logger.log({ containerId }, 'destroyed container')
+        logger.debug({ containerId }, 'destroyed container')
       }
       callback(error)
     })
@@ -548,7 +548,7 @@ const DockerRunner = {
     const age = now - created
     const maxAge = DockerRunner.MAX_CONTAINER_AGE
     const ttl = maxAge - age
-    logger.log(
+    logger.debug(
       { containerName: name, created, now, age, maxAge, ttl },
       'checking whether to destroy container'
     )
@@ -579,7 +579,7 @@ const DockerRunner = {
   },
 
   startContainerMonitor() {
-    logger.log(
+    logger.debug(
       { maxAge: DockerRunner.MAX_CONTAINER_AGE },
       'starting container expiry'
     )
diff --git a/services/clsi/app/js/DraftModeManager.js b/services/clsi/app/js/DraftModeManager.js
index b421fb2e62..a3b078fc0f 100644
--- a/services/clsi/app/js/DraftModeManager.js
+++ b/services/clsi/app/js/DraftModeManager.js
@@ -32,7 +32,7 @@ module.exports = DraftModeManager = {
         return callback()
       }
       const modified_content = DraftModeManager._injectDraftOption(content)
-      logger.log(
+      logger.debug(
         {
           content: content.slice(0, 1024), // \documentclass is normally v near the top
           modified_content: modified_content.slice(0, 1024),
diff --git a/services/clsi/app/js/LatexRunner.js b/services/clsi/app/js/LatexRunner.js
index fc8670047a..68bf6a299f 100644
--- a/services/clsi/app/js/LatexRunner.js
+++ b/services/clsi/app/js/LatexRunner.js
@@ -51,7 +51,7 @@ module.exports = LatexRunner = {
       timeout = 60000
     } // milliseconds
 
-    logger.log(
+    logger.debug(
       {
         directory,
         compiler,
@@ -169,7 +169,7 @@ module.exports = LatexRunner = {
       callback = function () {}
     }
     const id = `${project_id}`
-    logger.log({ id }, 'killing running compile')
+    logger.debug({ id }, 'killing running compile')
     if (ProcessTable[id] == null) {
       logger.warn({ id }, 'no such project to kill')
       return callback(null)
diff --git a/services/clsi/app/js/LocalCommandRunner.js b/services/clsi/app/js/LocalCommandRunner.js
index f8470f7b05..d1a4e7250a 100644
--- a/services/clsi/app/js/LocalCommandRunner.js
+++ b/services/clsi/app/js/LocalCommandRunner.js
@@ -17,7 +17,7 @@ const { spawn } = require('child_process')
 const _ = require('lodash')
 const logger = require('@overleaf/logger')
 
-logger.info('using standard command runner')
+logger.debug('using standard command runner')
 
 module.exports = CommandRunner = {
   run(
@@ -35,7 +35,7 @@ module.exports = CommandRunner = {
     command = Array.from(command).map(arg =>
       arg.toString().replace('$COMPILE_DIR', directory)
     )
-    logger.log({ project_id, command, directory }, 'running command')
+    logger.debug({ project_id, command, directory }, 'running command')
     logger.warn('timeouts and sandboxing are not enabled with CommandRunner')
 
     // merge environment settings
@@ -69,7 +69,7 @@ module.exports = CommandRunner = {
 
     proc.on('close', function (code, signal) {
       let err
-      logger.info({ code, signal, project_id }, 'command exited')
+      logger.debug({ code, signal, project_id }, 'command exited')
       if (signal === 'SIGTERM') {
         // signal from kill method below
         err = new Error('terminated')
diff --git a/services/clsi/app/js/OutputCacheManager.js b/services/clsi/app/js/OutputCacheManager.js
index 616b4f6c8d..fa9f0050a6 100644
--- a/services/clsi/app/js/OutputCacheManager.js
+++ b/services/clsi/app/js/OutputCacheManager.js
@@ -464,7 +464,7 @@ module.exports = OutputCacheManager = {
       OutputCacheManager.ARCHIVE_SUBDIR,
       buildId
     )
-    logger.log({ dir: archiveDir }, 'archiving log files for project')
+    logger.debug({ dir: archiveDir }, 'archiving log files for project')
     return fse.ensureDir(archiveDir, function (err) {
       if (err != null) {
         return callback(err)
@@ -577,7 +577,7 @@ module.exports = OutputCacheManager = {
 
       const removeDir = (dir, cb) =>
         fse.remove(Path.join(cacheRoot, dir), function (err, result) {
-          logger.log({ cache: cacheRoot, dir }, 'removed expired cache dir')
+          logger.debug({ cache: cacheRoot, dir }, 'removed expired cache dir')
           if (err != null) {
             logger.error({ err, dir }, 'cache remove error')
           }
diff --git a/services/clsi/app/js/OutputFileFinder.js b/services/clsi/app/js/OutputFileFinder.js
index 718fc1852a..c34945fcba 100644
--- a/services/clsi/app/js/OutputFileFinder.js
+++ b/services/clsi/app/js/OutputFileFinder.js
@@ -53,7 +53,7 @@ module.exports = OutputFileFinder = {
       'f',
       '-print',
     ]
-    logger.log({ args }, 'running find command')
+    logger.debug({ args }, 'running find command')
 
     const proc = spawn('find', args)
     let stdout = ''
diff --git a/services/clsi/app/js/OutputFileOptimiser.js b/services/clsi/app/js/OutputFileOptimiser.js
index af3a460e7f..6725841529 100644
--- a/services/clsi/app/js/OutputFileOptimiser.js
+++ b/services/clsi/app/js/OutputFileOptimiser.js
@@ -71,7 +71,7 @@ module.exports = OutputFileOptimiser = {
     }
     const tmpOutput = dst + '.opt'
     const args = ['--linearize', '--newline-before-endstream', src, tmpOutput]
-    logger.log({ args }, 'running qpdf command')
+    logger.debug({ args }, 'running qpdf command')
 
     const timer = new Metrics.Timer('qpdf')
     const proc = spawn('qpdf', args)
diff --git a/services/clsi/app/js/ProjectPersistenceManager.js b/services/clsi/app/js/ProjectPersistenceManager.js
index 6798700f9f..48982314a8 100644
--- a/services/clsi/app/js/ProjectPersistenceManager.js
+++ b/services/clsi/app/js/ProjectPersistenceManager.js
@@ -121,7 +121,7 @@ module.exports = ProjectPersistenceManager = {
       if (error != null) {
         return callback(error)
       }
-      logger.log({ project_ids }, 'clearing expired projects')
+      logger.debug({ project_ids }, 'clearing expired projects')
       const jobs = Array.from(project_ids || []).map(project_id =>
         (
           project_id => callback =>
@@ -152,7 +152,7 @@ module.exports = ProjectPersistenceManager = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ project_id, user_id }, 'clearing project for user')
+    logger.debug({ project_id, user_id }, 'clearing project for user')
     return CompileManager.clearProject(project_id, user_id, function (error) {
       if (error != null) {
         return callback(error)
@@ -173,7 +173,7 @@ module.exports = ProjectPersistenceManager = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ project_id }, 'clearing project from cache')
+    logger.debug({ project_id }, 'clearing project from cache')
     return UrlCache.clearProject(project_id, function (error) {
       if (error != null) {
         logger.err({ error, project_id }, 'error clearing project from cache')
@@ -212,7 +212,7 @@ module.exports = ProjectPersistenceManager = {
   },
 }
 
-logger.log(
+logger.debug(
   { EXPIRY_TIMEOUT: ProjectPersistenceManager.EXPIRY_TIMEOUT },
   'project assets kept timeout'
 )
diff --git a/services/clsi/app/js/ResourceStateManager.js b/services/clsi/app/js/ResourceStateManager.js
index 2d92c6c4f6..dbfb3c9fc4 100644
--- a/services/clsi/app/js/ResourceStateManager.js
+++ b/services/clsi/app/js/ResourceStateManager.js
@@ -26,7 +26,7 @@ module.exports = {
     const stateFile = Path.join(basePath, this.SYNC_STATE_FILE)
     if (state == null) {
       // remove the file if no state passed in
-      logger.log({ state, basePath }, 'clearing sync state')
+      logger.debug({ state, basePath }, 'clearing sync state')
       fs.unlink(stateFile, function (err) {
         if (err && err.code !== 'ENOENT') {
           return callback(err)
@@ -35,7 +35,7 @@ module.exports = {
         }
       })
     } else {
-      logger.log({ state, basePath }, 'writing sync state')
+      logger.debug({ state, basePath }, 'writing sync state')
       const resourceList = resources.map(resource => resource.path)
       fs.writeFile(
         stateFile,
@@ -67,7 +67,7 @@ module.exports = {
         const resourceList = array.slice(0, adjustedLength - 1)
         const oldState = array[adjustedLength - 1]
         const newState = `stateHash:${state}`
-        logger.log(
+        logger.debug(
           { state, oldState, basePath, stateMatches: newState === oldState },
           'checking sync state'
         )
diff --git a/services/clsi/app/js/ResourceWriter.js b/services/clsi/app/js/ResourceWriter.js
index 254d5e5a00..6c897f8d8d 100644
--- a/services/clsi/app/js/ResourceWriter.js
+++ b/services/clsi/app/js/ResourceWriter.js
@@ -32,7 +32,7 @@ module.exports = ResourceWriter = {
       callback = function () {}
     }
     if (request.syncType === 'incremental') {
-      logger.log(
+      logger.debug(
         { project_id: request.project_id, user_id: request.user_id },
         'incremental sync'
       )
@@ -77,7 +77,7 @@ module.exports = ResourceWriter = {
         }
       )
     }
-    logger.log(
+    logger.debug(
       { project_id: request.project_id, user_id: request.user_id },
       'full sync'
     )
@@ -160,7 +160,7 @@ module.exports = ResourceWriter = {
         if (err.code === 'EEXIST') {
           return callback()
         } else {
-          logger.log({ err, dir: basePath }, 'error creating directory')
+          logger.debug({ err, dir: basePath }, 'error creating directory')
           return callback(err)
         }
       } else {
diff --git a/services/clsi/app/js/TikzManager.js b/services/clsi/app/js/TikzManager.js
index 7a221d8e68..505f1776ba 100644
--- a/services/clsi/app/js/TikzManager.js
+++ b/services/clsi/app/js/TikzManager.js
@@ -29,7 +29,10 @@ module.exports = TikzManager = {
     }
     for (const resource of Array.from(resources)) {
       if (resource.path === 'output.tex') {
-        logger.log({ compileDir, mainFile }, 'output.tex already in resources')
+        logger.debug(
+          { compileDir, mainFile },
+          'output.tex already in resources'
+        )
         return callback(null, false)
       }
     }
@@ -55,7 +58,7 @@ module.exports = TikzManager = {
                 : undefined) >= 0
             const usesPsTool =
               (content != null ? content.indexOf('{pstool}') : undefined) >= 0
-            logger.log(
+            logger.debug(
               { compileDir, mainFile, usesTikzExternalize, usesPsTool },
               'checked for packages needing main file as output.tex'
             )
@@ -82,7 +85,7 @@ module.exports = TikzManager = {
           if (error != null) {
             return callback(error)
           }
-          logger.log(
+          logger.debug(
             { compileDir, mainFile },
             'copied file to output.tex as project uses packages which require it'
           )
diff --git a/services/clsi/app/js/UrlFetcher.js b/services/clsi/app/js/UrlFetcher.js
index b4ebca2c57..b02d9ee8c1 100644
--- a/services/clsi/app/js/UrlFetcher.js
+++ b/services/clsi/app/js/UrlFetcher.js
@@ -61,7 +61,7 @@ module.exports = UrlFetcher = {
       3 * oneMinute
     )
 
-    logger.log({ url, filePath }, 'started downloading url to cache')
+    logger.debug({ url, filePath }, 'started downloading url to cache')
     const urlStream = request.get({ url, timeout: oneMinute })
     urlStream.pause() // stop data flowing until we are ready
 
@@ -74,7 +74,7 @@ module.exports = UrlFetcher = {
     })
 
     urlStream.on('end', () =>
-      logger.log({ url, filePath }, 'finished downloading file into cache')
+      logger.debug({ url, filePath }, 'finished downloading file into cache')
     )
 
     return urlStream.on('response', function (res) {
@@ -97,7 +97,7 @@ module.exports = UrlFetcher = {
         })
 
         fileStream.on('finish', function () {
-          logger.log({ url, filePath }, 'finished writing file into cache')
+          logger.debug({ url, filePath }, 'finished writing file into cache')
           fs.rename(atomicWrite, filePath, error => {
             if (error) {
               fs.unlink(atomicWrite, () => callbackOnce(error))
@@ -108,7 +108,7 @@ module.exports = UrlFetcher = {
         })
 
         fileStream.on('pipe', () =>
-          logger.log({ url, filePath }, 'piping into filestream')
+          logger.debug({ url, filePath }, 'piping into filestream')
         )
 
         urlStream.pipe(fileStream)
diff --git a/services/contacts/app.js b/services/contacts/app.js
index 8867e7b268..7b5453a158 100644
--- a/services/contacts/app.js
+++ b/services/contacts/app.js
@@ -57,7 +57,9 @@ if (!module.parent) {
           logger.fatal({ err }, `Cannot bind to ${host}:${port}. Exiting.`)
           process.exit(1)
         }
-        return logger.info(`contacts starting up, listening on ${host}:${port}`)
+        return logger.debug(
+          `contacts starting up, listening on ${host}:${port}`
+        )
       })
     })
     .catch(err => {
diff --git a/services/contacts/app/js/HttpController.js b/services/contacts/app/js/HttpController.js
index 785020650d..f1e65f59a5 100644
--- a/services/contacts/app/js/HttpController.js
+++ b/services/contacts/app/js/HttpController.js
@@ -23,7 +23,7 @@ module.exports = HttpController = {
       return
     }
 
-    logger.log({ user_id, contact_id }, 'adding contact')
+    logger.debug({ user_id, contact_id }, 'adding contact')
 
     return ContactManager.touchContact(user_id, contact_id, function (error) {
       if (error != null) {
@@ -50,7 +50,7 @@ module.exports = HttpController = {
     }
     limit = Math.min(limit, HttpController.CONTACT_LIMIT)
 
-    logger.log({ user_id }, 'getting contacts')
+    logger.debug({ user_id }, 'getting contacts')
 
     return ContactManager.getContacts(user_id, function (error, contact_dict) {
       if (error != null) {
diff --git a/services/contacts/test/setup.js b/services/contacts/test/setup.js
index 42df904729..cc542536eb 100644
--- a/services/contacts/test/setup.js
+++ b/services/contacts/test/setup.js
@@ -2,7 +2,13 @@ const SandboxedModule = require('sandboxed-module')
 
 SandboxedModule.configure({
   requires: {
-    '@overleaf/logger': { log() {} },
+    '@overleaf/logger': {
+      debug() {},
+      info() {},
+      log() {},
+      warn() {},
+      error() {},
+    },
     '@overleaf/metrics': { timeAsyncMethod() {} },
   },
   globals: { Buffer, console, process },
diff --git a/services/docstore/app.js b/services/docstore/app.js
index 9b318627f3..b09b6d362b 100644
--- a/services/docstore/app.js
+++ b/services/docstore/app.js
@@ -109,7 +109,9 @@ if (!module.parent) {
           logger.fatal({ err }, `Cannot bind to ${host}:${port}. Exiting.`)
           process.exit(1)
         }
-        return logger.info(`Docstore starting up, listening on ${host}:${port}`)
+        return logger.debug(
+          `Docstore starting up, listening on ${host}:${port}`
+        )
       })
       server.timeout = 120000
       server.keepAliveTimeout = 5000
diff --git a/services/docstore/app/js/DocArchiveManager.js b/services/docstore/app/js/DocArchiveManager.js
index 99875c0e07..5ea98f85e7 100644
--- a/services/docstore/app/js/DocArchiveManager.js
+++ b/services/docstore/app/js/DocArchiveManager.js
@@ -70,7 +70,7 @@ async function archiveDocById(projectId, docId) {
 }
 
 async function archiveDoc(projectId, doc) {
-  logger.log(
+  logger.debug(
     { project_id: projectId, doc_id: doc._id },
     'sending doc to persistor'
   )
@@ -154,7 +154,7 @@ async function getDoc(projectId, docId) {
 
 // get the doc and unarchive it to mongo
 async function unarchiveDoc(projectId, docId) {
-  logger.log({ projectId, docId }, 'getting doc from persistor')
+  logger.debug({ projectId, docId }, 'getting doc from persistor')
   const mongoDoc = await MongoManager.findDoc(projectId, docId, {
     inS3: 1,
     rev: 1,
diff --git a/services/docstore/app/js/DocManager.js b/services/docstore/app/js/DocManager.js
index d3d21769f4..15b1efabff 100644
--- a/services/docstore/app/js/DocManager.js
+++ b/services/docstore/app/js/DocManager.js
@@ -289,7 +289,10 @@ module.exports = DocManager = {
             if (updateRanges) {
               update.ranges = ranges
             }
-            logger.log({ project_id, doc_id }, 'updating doc lines and ranges')
+            logger.debug(
+              { project_id, doc_id },
+              'updating doc lines and ranges'
+            )
 
             modified = true
             rev += 1 // rev will be incremented in mongo by MongoManager.upsertIntoDocCollection
@@ -300,7 +303,7 @@ module.exports = DocManager = {
               cb
             )
           } else {
-            logger.log(
+            logger.debug(
               { project_id, doc_id },
               'doc lines have not changed - not updating'
             )
@@ -310,7 +313,7 @@ module.exports = DocManager = {
 
         const updateVersionIfNeeded = function (cb) {
           if (updateVersion) {
-            logger.log(
+            logger.debug(
               {
                 project_id,
                 doc_id,
@@ -322,7 +325,7 @@ module.exports = DocManager = {
             modified = true
             return MongoManager.setDocVersion(doc_id, version, cb)
           } else {
-            logger.log(
+            logger.debug(
               { project_id, doc_id, version },
               'doc version has not changed - not updating'
             )
diff --git a/services/docstore/app/js/HealthChecker.js b/services/docstore/app/js/HealthChecker.js
index 93abd8ec5e..6af4339b4b 100644
--- a/services/docstore/app/js/HealthChecker.js
+++ b/services/docstore/app/js/HealthChecker.js
@@ -31,7 +31,7 @@ module.exports = {
       url,
       timeout: 3000,
     })
-    logger.log({ lines, url, doc_id, project_id }, 'running health check')
+    logger.debug({ lines, url, doc_id, project_id }, 'running health check')
     const jobs = [
       function (cb) {
         const opts = getOpts()
diff --git a/services/docstore/app/js/HttpController.js b/services/docstore/app/js/HttpController.js
index 55f0c1226e..4f3adf2aa4 100644
--- a/services/docstore/app/js/HttpController.js
+++ b/services/docstore/app/js/HttpController.js
@@ -8,12 +8,12 @@ const Settings = require('@overleaf/settings')
 function getDoc(req, res, next) {
   const { doc_id: docId, project_id: projectId } = req.params
   const includeDeleted = req.query.include_deleted === 'true'
-  logger.log({ projectId, docId }, 'getting doc')
+  logger.debug({ projectId, docId }, 'getting doc')
   DocManager.getFullDoc(projectId, docId, function (error, doc) {
     if (error) {
       return next(error)
     }
-    logger.log({ docId, projectId }, 'got doc')
+    logger.debug({ docId, projectId }, 'got doc')
     if (doc == null) {
       res.sendStatus(404)
     } else if (doc.deleted && !includeDeleted) {
@@ -26,7 +26,7 @@ function getDoc(req, res, next) {
 
 function peekDoc(req, res, next) {
   const { doc_id: docId, project_id: projectId } = req.params
-  logger.log({ projectId, docId }, 'peeking doc')
+  logger.debug({ projectId, docId }, 'peeking doc')
   DocManager.peekDoc(projectId, docId, function (error, doc) {
     if (error) {
       return next(error)
@@ -52,7 +52,7 @@ function isDocDeleted(req, res, next) {
 
 function getRawDoc(req, res, next) {
   const { doc_id: docId, project_id: projectId } = req.params
-  logger.log({ projectId, docId }, 'getting raw doc')
+  logger.debug({ projectId, docId }, 'getting raw doc')
   DocManager.getDocLines(projectId, docId, function (error, doc) {
     if (error) {
       return next(error)
@@ -68,7 +68,7 @@ function getRawDoc(req, res, next) {
 
 function getAllDocs(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'getting all docs')
+  logger.debug({ projectId }, 'getting all docs')
   DocManager.getAllNonDeletedDocs(
     projectId,
     { lines: true, rev: true },
@@ -86,7 +86,7 @@ function getAllDocs(req, res, next) {
 
 function getAllDeletedDocs(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'getting all deleted docs')
+  logger.debug({ projectId }, 'getting all deleted docs')
   DocManager.getAllDeletedDocs(
     projectId,
     { name: true, deletedAt: true },
@@ -107,7 +107,7 @@ function getAllDeletedDocs(req, res, next) {
 
 function getAllRanges(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'getting all ranges')
+  logger.debug({ projectId }, 'getting all ranges')
   DocManager.getAllNonDeletedDocs(
     projectId,
     { ranges: true },
@@ -154,7 +154,7 @@ function updateDoc(req, res, next) {
     return
   }
 
-  logger.log({ projectId, docId }, 'got http request to update doc')
+  logger.debug({ projectId, docId }, 'got http request to update doc')
   DocManager.updateDoc(
     projectId,
     docId,
@@ -175,7 +175,7 @@ function updateDoc(req, res, next) {
 
 function patchDoc(req, res, next) {
   const { doc_id: docId, project_id: projectId } = req.params
-  logger.log({ projectId, docId }, 'patching doc')
+  logger.debug({ projectId, docId }, 'patching doc')
 
   const allowedFields = ['deleted', 'deletedAt', 'name']
   const meta = {}
@@ -226,7 +226,7 @@ function _buildDocsArrayView(projectId, docs) {
 
 function archiveAllDocs(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'archiving all docs')
+  logger.debug({ projectId }, 'archiving all docs')
   DocArchive.archiveAllDocs(projectId, function (error) {
     if (error) {
       return next(error)
@@ -237,7 +237,7 @@ function archiveAllDocs(req, res, next) {
 
 function archiveDoc(req, res, next) {
   const { doc_id: docId, project_id: projectId } = req.params
-  logger.log({ projectId, docId }, 'archiving a doc')
+  logger.debug({ projectId, docId }, 'archiving a doc')
   DocArchive.archiveDocById(projectId, docId, function (error) {
     if (error) {
       return next(error)
@@ -248,7 +248,7 @@ function archiveDoc(req, res, next) {
 
 function unArchiveAllDocs(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'unarchiving all docs')
+  logger.debug({ projectId }, 'unarchiving all docs')
   DocArchive.unArchiveAllDocs(projectId, function (err) {
     if (err) {
       if (err instanceof Errors.DocRevValueError) {
@@ -263,7 +263,7 @@ function unArchiveAllDocs(req, res, next) {
 
 function destroyProject(req, res, next) {
   const { project_id: projectId } = req.params
-  logger.log({ projectId }, 'destroying all docs')
+  logger.debug({ projectId }, 'destroying all docs')
   DocArchive.destroyProject(projectId, function (error) {
     if (error) {
       return next(error)
diff --git a/services/docstore/test/setup.js b/services/docstore/test/setup.js
index aadb0f3a41..9fef936003 100644
--- a/services/docstore/test/setup.js
+++ b/services/docstore/test/setup.js
@@ -15,7 +15,9 @@ chai.use(chaiAsPromised)
 const sandbox = sinon.createSandbox()
 const stubs = {
   logger: {
+    debug: sandbox.stub(),
     log: sandbox.stub(),
+    info: sandbox.stub(),
     warn: sandbox.stub(),
     err: sandbox.stub(),
     error: sandbox.stub(),
diff --git a/services/filestore/app.js b/services/filestore/app.js
index fc89743cf9..48cbd1071d 100644
--- a/services/filestore/app.js
+++ b/services/filestore/app.js
@@ -145,7 +145,7 @@ if (!module.parent) {
       logger.error('Error starting Filestore', error)
       throw error
     }
-    logger.info(`Filestore starting up, listening on ${host}:${port}`)
+    logger.debug(`Filestore starting up, listening on ${host}:${port}`)
   })
 }
 
diff --git a/services/notifications/app.js b/services/notifications/app.js
index eb27a575e1..18de1616e4 100644
--- a/services/notifications/app.js
+++ b/services/notifications/app.js
@@ -68,7 +68,7 @@ mongodb
   .waitForDb()
   .then(() => {
     app.listen(port, host, () =>
-      logger.info(`notifications starting up, listening on ${host}:${port}`)
+      logger.debug(`notifications starting up, listening on ${host}:${port}`)
     )
   })
   .catch(err => {
diff --git a/services/notifications/app/js/HealthCheckController.js b/services/notifications/app/js/HealthCheckController.js
index 21b3d5b67e..d7c97df40d 100644
--- a/services/notifications/app/js/HealthCheckController.js
+++ b/services/notifications/app/js/HealthCheckController.js
@@ -29,7 +29,7 @@ module.exports = {
       url: `http://localhost:${port}/user/${user_id}${endPath}`,
       timeout: 5000,
     })
-    logger.log(
+    logger.debug(
       { user_id, opts: getOpts(), key: notification_key, user_id },
       'Health Check: running'
     )
@@ -82,7 +82,7 @@ module.exports = {
         const notification_id = body[1][0]._id
         notification_key = body[1][0].key
         let opts = getOpts(`/notification/${notification_id}`)
-        logger.log(
+        logger.debug(
           { notification_id, notification_key },
           'Health Check: doing cleanup'
         )
diff --git a/services/notifications/app/js/NotificationsController.js b/services/notifications/app/js/NotificationsController.js
index 6c3a59bea7..706c03525b 100644
--- a/services/notifications/app/js/NotificationsController.js
+++ b/services/notifications/app/js/NotificationsController.js
@@ -15,7 +15,7 @@ const metrics = require('@overleaf/metrics')
 
 module.exports = {
   getUserNotifications(req, res, next) {
-    logger.log(
+    logger.debug(
       { user_id: req.params.user_id },
       'getting user unread notifications'
     )
@@ -30,7 +30,7 @@ module.exports = {
   },
 
   addNotification(req, res) {
-    logger.log(
+    logger.debug(
       { user_id: req.params.user_id, notification: req.body },
       'adding notification'
     )
@@ -49,7 +49,7 @@ module.exports = {
   },
 
   removeNotificationId(req, res, next) {
-    logger.log(
+    logger.debug(
       {
         user_id: req.params.user_id,
         notification_id: req.params.notification_id,
@@ -68,7 +68,7 @@ module.exports = {
   },
 
   removeNotificationKey(req, res, next) {
-    logger.log(
+    logger.debug(
       { user_id: req.params.user_id, notification_key: req.body.key },
       'mark key notification as read'
     )
@@ -85,7 +85,7 @@ module.exports = {
 
   removeNotificationByKeyOnly(req, res, next) {
     const notification_key = req.params.key
-    logger.log({ notification_key }, 'mark notification as read by key only')
+    logger.debug({ notification_key }, 'mark notification as read by key only')
     metrics.inc('removeNotificationKey')
     return Notifications.removeNotificationByKeyOnly(notification_key, err => {
       if (err) return next(err)
diff --git a/services/spelling/app.js b/services/spelling/app.js
index 8dbcd2a30f..70364afefe 100644
--- a/services/spelling/app.js
+++ b/services/spelling/app.js
@@ -44,7 +44,7 @@ if (!module.parent) {
     if (error != null) {
       throw error
     }
-    return logger.info(`spelling starting up, listening on ${host}:${port}`)
+    return logger.debug(`spelling starting up, listening on ${host}:${port}`)
   })
 }
 
diff --git a/services/spelling/app/js/ASpell.js b/services/spelling/app/js/ASpell.js
index 658111067a..69926bc83a 100644
--- a/services/spelling/app/js/ASpell.js
+++ b/services/spelling/app/js/ASpell.js
@@ -28,7 +28,7 @@ try {
   const oldCache = fs.readFileSync(cacheFsPath)
   cache.load(JSON.parse(oldCache))
 } catch (error) {
-  logger.log(
+  logger.debug(
     OError.tag(error, 'could not load the cache file', { cacheFsPath })
   )
 }
@@ -38,14 +38,14 @@ const cacheDump = setInterval(function () {
   const dump = JSON.stringify(cache.dump())
   return fs.writeFile(cacheFsPathTmp, dump, function (err) {
     if (err != null) {
-      logger.log(OError.tag(err, 'error writing cache file'))
+      logger.debug(OError.tag(err, 'error writing cache file'))
       fs.unlink(cacheFsPathTmp, () => {})
     } else {
       fs.rename(cacheFsPathTmp, cacheFsPath, err => {
         if (err) {
           logger.error(OError.tag(err, 'error renaming cache file'))
         } else {
-          logger.log({ len: dump.length, cacheFsPath }, 'wrote cache file')
+          logger.debug({ len: dump.length, cacheFsPath }, 'wrote cache file')
         }
       })
     }
@@ -96,7 +96,7 @@ class ASpellRunner {
         cache.set(k, v)
       }
 
-      logger.info(
+      logger.debug(
         {
           hits,
           total: words.length,
diff --git a/services/spelling/app/js/ASpellWorker.js b/services/spelling/app/js/ASpellWorker.js
index a5a700508c..86ea15c84f 100644
--- a/services/spelling/app/js/ASpellWorker.js
+++ b/services/spelling/app/js/ASpellWorker.js
@@ -27,14 +27,14 @@ class ASpellWorker {
       '-d',
       language,
     ])
-    logger.info(
+    logger.debug(
       { process: this.pipe.pid, lang: this.language },
       'starting new aspell worker'
     )
     metrics.inc('aspellWorker', 1, { status: 'start', method: this.language })
     this.pipe.on('exit', () => {
       this.state = 'killed'
-      logger.info(
+      logger.debug(
         { process: this.pipe.pid, lang: this.language },
         'aspell worker has exited'
       )
@@ -201,14 +201,14 @@ class ASpellWorker {
   }
 
   shutdown(reason) {
-    logger.info({ process: this.pipe.pid, reason }, 'shutting down')
+    logger.debug({ process: this.pipe.pid, reason }, 'shutting down')
     this.state = 'closing'
     this.closeReason = reason
     return this.pipe.stdin.end()
   }
 
   kill(reason) {
-    logger.info({ process: this.pipe.pid, reason }, 'killing')
+    logger.debug({ process: this.pipe.pid, reason }, 'killing')
     this.closeReason = reason
     if (this.state === 'killed') {
       return
diff --git a/services/spelling/app/js/ASpellWorkerPool.js b/services/spelling/app/js/ASpellWorkerPool.js
index c99ba0f3ef..cc08f0cef4 100644
--- a/services/spelling/app/js/ASpellWorkerPool.js
+++ b/services/spelling/app/js/ASpellWorkerPool.js
@@ -28,7 +28,7 @@ class ASpellWorkerPool {
 
   create(language) {
     if (this.PROCESS_POOL.length >= this.MAX_WORKERS) {
-      logger.log(
+      logger.debug(
         { maxworkers: this.MAX_WORKERS },
         'maximum number of workers already running'
       )
@@ -44,7 +44,7 @@ class ASpellWorkerPool {
         clearTimeout(worker.idleTimer)
         worker.idleTimer = null
       }
-      logger.info(
+      logger.debug(
         { process: worker.pipe.pid, lang: language },
         'removing aspell worker from pool'
       )
diff --git a/services/spelling/app/js/HealthCheckController.js b/services/spelling/app/js/HealthCheckController.js
index 40513c2eb2..453184a518 100644
--- a/services/spelling/app/js/HealthCheckController.js
+++ b/services/spelling/app/js/HealthCheckController.js
@@ -26,7 +26,7 @@ module.exports = {
           : 0
 
       if (numberOfSuggestions > 10) {
-        logger.log('health check passed')
+        logger.debug('health check passed')
         res.sendStatus(200)
       } else {
         logger.err(
diff --git a/services/spelling/app/js/SpellingAPIController.js b/services/spelling/app/js/SpellingAPIController.js
index 77d8f52105..c71301ec49 100644
--- a/services/spelling/app/js/SpellingAPIController.js
+++ b/services/spelling/app/js/SpellingAPIController.js
@@ -14,7 +14,7 @@ module.exports = {
   check(req, res) {
     metrics.inc('spelling-check', 0.1)
     const { token, wordCount } = extractCheckRequestData(req)
-    logger.info({ token, wordCount }, 'running check')
+    logger.debug({ token, wordCount }, 'running check')
     SpellingAPIManager.runRequest(token, req.body, function (error, result) {
       if (error != null) {
         logger.error(
diff --git a/services/track-changes/app.js b/services/track-changes/app.js
index e0f02c2622..5be3447040 100644
--- a/services/track-changes/app.js
+++ b/services/track-changes/app.js
@@ -87,7 +87,7 @@ app.post('/pack', function (req, res, next) {
   if (packWorker != null) {
     return res.send('pack already running')
   } else {
-    logger.log('running pack')
+    logger.debug('running pack')
     packWorker = childProcess.fork(
       Path.join(__dirname, '/app/js/PackWorker.js'),
       [
@@ -97,7 +97,7 @@ app.post('/pack', function (req, res, next) {
       ]
     )
     packWorker.on('exit', function (code, signal) {
-      logger.log({ code, signal }, 'history auto pack exited')
+      logger.debug({ code, signal }, 'history auto pack exited')
       return (packWorker = null)
     })
     return res.send('pack started')
@@ -142,7 +142,7 @@ if (!module.parent) {
             'could not start track-changes server'
           )
         } else {
-          return logger.info(
+          return logger.debug(
             `trackchanges starting up, listening on ${host}:${port}`
           )
         }
diff --git a/services/track-changes/app/js/DiffManager.js b/services/track-changes/app/js/DiffManager.js
index 40e3cb9a3e..a1d5fd8b9d 100644
--- a/services/track-changes/app/js/DiffManager.js
+++ b/services/track-changes/app/js/DiffManager.js
@@ -127,7 +127,7 @@ module.exports = DiffManager = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log(
+    logger.debug(
       { project_id, doc_id, version },
       'getting document before version'
     )
@@ -162,7 +162,7 @@ module.exports = DiffManager = {
           return callback(error)
         }
 
-        logger.log(
+        logger.debug(
           {
             docVersion: version,
             lastUpdateVersion: lastUpdate != null ? lastUpdate.v : undefined,
diff --git a/services/track-changes/app/js/DocstoreManager.js b/services/track-changes/app/js/DocstoreManager.js
index 5235cb7372..99337ff29f 100644
--- a/services/track-changes/app/js/DocstoreManager.js
+++ b/services/track-changes/app/js/DocstoreManager.js
@@ -5,7 +5,7 @@ const Errors = require('./Errors')
 
 function peekDocument(projectId, docId, callback) {
   const url = `${Settings.apis.docstore.url}/project/${projectId}/doc/${docId}/peek`
-  logger.log(
+  logger.debug(
     { project_id: projectId, doc_id: docId },
     'getting doc from docstore'
   )
@@ -19,7 +19,7 @@ function peekDocument(projectId, docId, callback) {
       } catch (error) {
         return callback(error)
       }
-      logger.log(
+      logger.debug(
         { project_id: projectId, doc_id: docId, version: body.version },
         'got doc from docstore'
       )
diff --git a/services/track-changes/app/js/DocumentUpdaterManager.js b/services/track-changes/app/js/DocumentUpdaterManager.js
index 50d9716263..24ccf96304 100644
--- a/services/track-changes/app/js/DocumentUpdaterManager.js
+++ b/services/track-changes/app/js/DocumentUpdaterManager.js
@@ -21,7 +21,7 @@ module.exports = DocumentUpdaterManager = {
       callback = function () {}
     }
 
-    logger.log({ project_id, doc_id }, 'getting doc from document updater')
+    logger.debug({ project_id, doc_id }, 'getting doc from document updater')
     return request.get(url, function (error, res, body) {
       if (error != null) {
         return callback(error)
@@ -33,7 +33,7 @@ module.exports = DocumentUpdaterManager = {
           error = error1
           return callback(error)
         }
-        logger.log(
+        logger.debug(
           { project_id, doc_id, version: body.version },
           'got doc from document updater'
         )
@@ -66,7 +66,7 @@ module.exports = DocumentUpdaterManager = {
       callback = function () {}
     }
     const url = `${Settings.apis.documentupdater.url}/project/${project_id}/doc/${doc_id}`
-    logger.log({ project_id, doc_id }, 'setting doc in document updater')
+    logger.debug({ project_id, doc_id }, 'setting doc in document updater')
     return request.post(
       {
         url,
diff --git a/services/track-changes/app/js/HealthChecker.js b/services/track-changes/app/js/HealthChecker.js
index 9459a1a8f2..0a558674ef 100644
--- a/services/track-changes/app/js/HealthChecker.js
+++ b/services/track-changes/app/js/HealthChecker.js
@@ -21,7 +21,7 @@ module.exports = {
   check(callback) {
     const project_id = ObjectId(settings.trackchanges.healthCheck.project_id)
     const url = `http://localhost:${port}/project/${project_id}`
-    logger.log({ project_id }, 'running health check')
+    logger.debug({ project_id }, 'running health check')
     const jobs = [
       cb =>
         request.get(
diff --git a/services/track-changes/app/js/HttpController.js b/services/track-changes/app/js/HttpController.js
index 5194d7bcd7..7df4224ed7 100644
--- a/services/track-changes/app/js/HttpController.js
+++ b/services/track-changes/app/js/HttpController.js
@@ -30,7 +30,7 @@ module.exports = HttpController = {
     }
     const { doc_id } = req.params
     const { project_id } = req.params
-    logger.log({ project_id, doc_id }, 'compressing doc history')
+    logger.debug({ project_id, doc_id }, 'compressing doc history')
     return UpdatesManager.processUncompressedUpdatesWithLock(
       project_id,
       doc_id,
@@ -48,7 +48,7 @@ module.exports = HttpController = {
       next = function () {}
     }
     const { project_id } = req.params
-    logger.log({ project_id }, 'compressing project history')
+    logger.debug({ project_id }, 'compressing project history')
     return UpdatesManager.processUncompressedUpdatesForProject(
       project_id,
       function (error) {
@@ -66,7 +66,7 @@ module.exports = HttpController = {
       next = function () {}
     }
     const limit = req.query.limit != null ? parseInt(req.query.limit, 10) : -1
-    logger.log({ limit }, 'flushing all projects')
+    logger.debug({ limit }, 'flushing all projects')
     return UpdatesManager.flushAll(limit, function (error, result) {
       if (error != null) {
         return next(error)
@@ -78,7 +78,7 @@ module.exports = HttpController = {
           .status(200)
           .send(`${status}\nwould flush:\n${all.join('\n')}\n`)
       } else if (failed.length > 0) {
-        logger.log({ failed, succeeded }, 'error flushing projects')
+        logger.debug({ failed, succeeded }, 'error flushing projects')
         return res
           .status(500)
           .send(`${status}\nfailed to flush:\n${failed.join('\n')}\n`)
@@ -96,13 +96,13 @@ module.exports = HttpController = {
     if (next == null) {
       next = function () {}
     }
-    logger.log('checking dangling updates')
+    logger.debug('checking dangling updates')
     return UpdatesManager.getDanglingUpdates(function (error, result) {
       if (error != null) {
         return next(error)
       }
       if (result.length > 0) {
-        logger.log({ dangling: result }, 'found dangling updates')
+        logger.debug({ dangling: result }, 'found dangling updates')
         return res.status(500).send(`dangling updates:\n${result.join('\n')}\n`)
       } else {
         return res.status(200).send('no dangling updates found\n')
@@ -116,7 +116,7 @@ module.exports = HttpController = {
     }
     const { doc_id } = req.params
     const { project_id } = req.params
-    logger.log({ project_id, doc_id }, 'checking doc history')
+    logger.debug({ project_id, doc_id }, 'checking doc history')
     return DiffManager.getDocumentBeforeVersion(
       project_id,
       doc_id,
@@ -161,7 +161,7 @@ module.exports = HttpController = {
       to = null
     }
 
-    logger.log({ project_id, doc_id, from, to }, 'getting diff')
+    logger.debug({ project_id, doc_id, from, to }, 'getting diff')
     return DiffManager.getDiff(
       project_id,
       doc_id,
@@ -207,7 +207,7 @@ module.exports = HttpController = {
 
   zipProject(req, res, next) {
     const { project_id: projectId } = req.params
-    logger.log({ projectId }, 'exporting project history as zip file')
+    logger.debug({ projectId }, 'exporting project history as zip file')
     ZipManager.makeTempDirectory((err, tmpdir) => {
       if (err) {
         return next(err)
@@ -234,7 +234,7 @@ module.exports = HttpController = {
     //  - multiple updates form a pack
     // Flush updates per pack onto the wire.
     const { project_id } = req.params
-    logger.log({ project_id }, 'exporting project history')
+    logger.debug({ project_id }, 'exporting project history')
     UpdatesManager.exportProject(
       project_id,
       function (err, { updates, userIds }, confirmWrite) {
@@ -317,7 +317,7 @@ module.exports = HttpController = {
     }
     const { project_id } = req.params
     const { doc_id } = req.params
-    logger.log({ project_id, doc_id }, 'pushing all finalised changes to s3')
+    logger.debug({ project_id, doc_id }, 'pushing all finalised changes to s3')
     return PackManager.pushOldPacks(project_id, doc_id, function (error) {
       if (error != null) {
         return next(error)
@@ -332,7 +332,7 @@ module.exports = HttpController = {
     }
     const { project_id } = req.params
     const { doc_id } = req.params
-    logger.log({ project_id, doc_id }, 'pulling all packs from s3')
+    logger.debug({ project_id, doc_id }, 'pulling all packs from s3')
     return PackManager.pullOldPacks(project_id, doc_id, function (error) {
       if (error != null) {
         return next(error)
diff --git a/services/track-changes/app/js/MongoAWS.js b/services/track-changes/app/js/MongoAWS.js
index 75ba2d4fd4..9e905d05b5 100644
--- a/services/track-changes/app/js/MongoAWS.js
+++ b/services/track-changes/app/js/MongoAWS.js
@@ -64,7 +64,7 @@ module.exports = MongoAWS = {
       return callback(new Error('invalid pack id'))
     }
 
-    logger.log({ project_id, doc_id, pack_id }, 'uploading data to s3')
+    logger.debug({ project_id, doc_id, pack_id }, 'uploading data to s3')
 
     const upload = createStream(S3S.WriteStream, project_id, doc_id, pack_id)
 
@@ -85,7 +85,7 @@ module.exports = MongoAWS = {
         return callback(error)
       }
       return zlib.gzip(uncompressedData, function (err, buf) {
-        logger.log(
+        logger.debug(
           {
             project_id,
             doc_id,
@@ -101,7 +101,10 @@ module.exports = MongoAWS = {
         upload.on('error', err => callback(err))
         upload.on('finish', function () {
           Metrics.inc('archive-pack')
-          logger.log({ project_id, doc_id, pack_id }, 'upload to s3 completed')
+          logger.debug(
+            { project_id, doc_id, pack_id },
+            'upload to s3 completed'
+          )
           return callback(null)
         })
         upload.write(buf)
@@ -129,7 +132,7 @@ module.exports = MongoAWS = {
       return callback(new Error('invalid pack id'))
     }
 
-    logger.log({ project_id, doc_id, pack_id }, 'downloading data from s3')
+    logger.debug({ project_id, doc_id, pack_id }, 'downloading data from s3')
 
     const download = createStream(S3S.ReadStream, project_id, doc_id, pack_id)
 
@@ -140,7 +143,7 @@ module.exports = MongoAWS = {
     const gunzip = zlib.createGunzip()
     gunzip.setEncoding('utf8')
     gunzip.on('error', function (err) {
-      logger.log(
+      logger.debug(
         { project_id, doc_id, pack_id, err },
         'error uncompressing gzip stream'
       )
@@ -152,7 +155,10 @@ module.exports = MongoAWS = {
     outputStream.on('error', err => callback(err))
     outputStream.on('end', function () {
       let object
-      logger.log({ project_id, doc_id, pack_id }, 'download from s3 completed')
+      logger.debug(
+        { project_id, doc_id, pack_id },
+        'download from s3 completed'
+      )
       try {
         object = JSON.parse(parts.join(''))
       } catch (e) {
@@ -186,7 +192,10 @@ module.exports = MongoAWS = {
         Metrics.inc('unarchive-pack')
         // allow the object to expire, we can always retrieve it again
         object.expiresAt = new Date(Date.now() + 7 * DAYS)
-        logger.log({ project_id, doc_id, pack_id }, 'inserting object from s3')
+        logger.debug(
+          { project_id, doc_id, pack_id },
+          'inserting object from s3'
+        )
         return db.docHistory.insertOne(object, (err, confirmation) => {
           if (err) return callback(err)
           object._id = confirmation.insertedId
diff --git a/services/track-changes/app/js/PackManager.js b/services/track-changes/app/js/PackManager.js
index bb336e4525..ebe979deca 100644
--- a/services/track-changes/app/js/PackManager.js
+++ b/services/track-changes/app/js/PackManager.js
@@ -217,7 +217,7 @@ module.exports = PackManager = {
       newPack.expiresAt = new Date(Date.now() + 7 * DAYS)
       newPack.last_checked = new Date(Date.now() + 30 * DAYS) // never check temporary packs
     }
-    logger.log(
+    logger.debug(
       { project_id, doc_id, newUpdates },
       'inserting updates into new pack'
     )
@@ -271,7 +271,7 @@ module.exports = PackManager = {
     if (lastUpdate.expiresAt && temporary) {
       update.$set.expiresAt = new Date(Date.now() + 7 * DAYS)
     }
-    logger.log(
+    logger.debug(
       { project_id, doc_id, lastUpdate, newUpdates },
       'appending updates to existing pack'
     )
@@ -402,7 +402,7 @@ module.exports = PackManager = {
           pack._id.toString()
         )
         const packIdsToFetch = _.difference(allPackIds, loadedPackIds)
-        logger.log(
+        logger.debug(
           { project_id, doc_id, loadedPackIds, allPackIds, packIdsToFetch },
           'analysed packs'
         )
@@ -418,7 +418,7 @@ module.exports = PackManager = {
             if (err != null) {
               return callback(err)
             }
-            logger.log({ project_id, doc_id }, 'done unarchiving')
+            logger.debug({ project_id, doc_id }, 'done unarchiving')
             return callback()
           }
         )
@@ -663,7 +663,7 @@ module.exports = PackManager = {
             if (err != null) {
               return callback(err)
             }
-            logger.log(
+            logger.debug(
               { project_id, doc_id, newPacks },
               'added new packs to index'
             )
@@ -769,7 +769,7 @@ module.exports = PackManager = {
             return result1
           })()
           if (newPacks.length) {
-            logger.log(
+            logger.debug(
               { project_id, doc_id, n: newPacks.length },
               'found new packs'
             )
@@ -959,7 +959,7 @@ module.exports = PackManager = {
           return callback(err)
         }
       )
-    logger.log({ project_id, doc_id }, 'processing old packs')
+    logger.debug({ project_id, doc_id }, 'processing old packs')
     return db.docHistory.findOne({ _id: pack_id }, function (err, pack) {
       if (err != null) {
         return markAsChecked(err)
@@ -998,7 +998,7 @@ module.exports = PackManager = {
                       ? unarchivedPacks.length
                       : undefined)
                   ) {
-                    logger.log(
+                    logger.debug(
                       { project_id, doc_id },
                       'no packs need archiving'
                     )
@@ -1012,7 +1012,7 @@ module.exports = PackManager = {
                       if (err != null) {
                         return markAsChecked(err)
                       }
-                      logger.log({ project_id, doc_id }, 'done processing')
+                      logger.debug({ project_id, doc_id }, 'done processing')
                       return markAsChecked()
                     }
                   )
@@ -1031,13 +1031,16 @@ module.exports = PackManager = {
     const age = (Date.now() - pack.meta.end_ts) / DAYS
     if (age < 30) {
       // always keep if less than 1 month old
-      logger.log({ project_id, doc_id, pack_id, age }, 'less than 30 days old')
+      logger.debug(
+        { project_id, doc_id, pack_id, age },
+        'less than 30 days old'
+      )
       return callback()
     }
     // compute an archiving threshold which decreases for each month of age
     const archive_threshold = 30 / age
     if (sz > archive_threshold || n > archive_threshold || age > 90) {
-      logger.log(
+      logger.debug(
         { project_id, doc_id, pack_id, age, archive_threshold, sz, n },
         'meets archive threshold'
       )
@@ -1048,7 +1051,7 @@ module.exports = PackManager = {
         callback
       )
     } else {
-      logger.log(
+      logger.debug(
         { project_id, doc_id, pack_id, age, archive_threshold, sz, n },
         'does not meet archive threshold'
       )
@@ -1071,7 +1074,7 @@ module.exports = PackManager = {
   },
 
   _markPackAsFinalised(project_id, doc_id, pack_id, callback) {
-    logger.log({ project_id, doc_id, pack_id }, 'marking pack as finalised')
+    logger.debug({ project_id, doc_id, pack_id }, 'marking pack as finalised')
     return db.docHistory.updateOne(
       { _id: pack_id },
       { $set: { finalised: true } },
@@ -1080,7 +1083,7 @@ module.exports = PackManager = {
   },
 
   updateIndexIfNeeded(project_id, doc_id, callback) {
-    logger.log({ project_id, doc_id }, 'archiving old packs')
+    logger.debug({ project_id, doc_id }, 'archiving old packs')
     return PackManager.getIndexWithKeys(doc_id, function (err, index) {
       if (err != null) {
         return callback(err)
@@ -1094,7 +1097,7 @@ module.exports = PackManager = {
   },
 
   markPackAsChecked(project_id, doc_id, pack_id, callback) {
-    logger.log({ project_id, doc_id, pack_id }, 'marking pack as checked')
+    logger.debug({ project_id, doc_id, pack_id }, 'marking pack as checked')
     return db.docHistory.updateOne(
       { _id: pack_id },
       { $currentDate: { last_checked: true } },
@@ -1119,7 +1122,7 @@ module.exports = PackManager = {
         return result
       })()
       if (unArchivedPacks.length) {
-        logger.log(
+        logger.debug(
           { project_id, doc_id, n: unArchivedPacks.length },
           'find unarchived packs'
         )
@@ -1131,7 +1134,7 @@ module.exports = PackManager = {
   // Archive locking flags
 
   checkArchiveNotInProgress(project_id, doc_id, pack_id, callback) {
-    logger.log(
+    logger.debug(
       { project_id, doc_id, pack_id },
       'checking if archive in progress'
     )
@@ -1157,7 +1160,7 @@ module.exports = PackManager = {
   },
 
   markPackAsArchiveInProgress(project_id, doc_id, pack_id, callback) {
-    logger.log(
+    logger.debug(
       { project_id, doc_id },
       'marking pack as archive in progress status'
     )
@@ -1175,7 +1178,7 @@ module.exports = PackManager = {
         if (!result.value) {
           return callback(new Error('archive is already in progress'))
         }
-        logger.log(
+        logger.debug(
           { project_id, doc_id, pack_id },
           'marked as archive in progress'
         )
@@ -1185,7 +1188,7 @@ module.exports = PackManager = {
   },
 
   clearPackAsArchiveInProgress(project_id, doc_id, pack_id, callback) {
-    logger.log(
+    logger.debug(
       { project_id, doc_id, pack_id },
       'clearing as archive in progress'
     )
@@ -1200,7 +1203,7 @@ module.exports = PackManager = {
   },
 
   markPackAsArchived(project_id, doc_id, pack_id, callback) {
-    logger.log({ project_id, doc_id, pack_id }, 'marking pack as archived')
+    logger.debug({ project_id, doc_id, pack_id }, 'marking pack as archived')
     return db.docHistoryIndex.findOneAndUpdate(
       {
         _id: ObjectId(doc_id.toString()),
@@ -1215,7 +1218,7 @@ module.exports = PackManager = {
         if (!result.value) {
           return callback(new Error('archive is not marked as progress'))
         }
-        logger.log({ project_id, doc_id, pack_id }, 'marked as archived')
+        logger.debug({ project_id, doc_id, pack_id }, 'marked as archived')
         return callback()
       }
     )
@@ -1229,7 +1232,7 @@ module.exports = PackManager = {
         if (err) {
           return callback(err)
         }
-        logger.log({ project_id, doc_id, pack_id }, 'set expiry on pack')
+        logger.debug({ project_id, doc_id, pack_id }, 'set expiry on pack')
         return callback()
       }
     )
diff --git a/services/track-changes/app/js/PackWorker.js b/services/track-changes/app/js/PackWorker.js
index 45f2efa82e..a726c7d9c8 100644
--- a/services/track-changes/app/js/PackWorker.js
+++ b/services/track-changes/app/js/PackWorker.js
@@ -64,7 +64,7 @@ if (!source.match(/^[0-9]+$/)) {
 
 let shutDownRequested = false
 const shutDownTimer = setTimeout(function () {
-  logger.log('pack timed out, requesting shutdown')
+  logger.debug('pack timed out, requesting shutdown')
   // start the shutdown on the next pack
   shutDownRequested = true
   // do a hard shutdown after a further 5 minutes
@@ -75,20 +75,20 @@ const shutDownTimer = setTimeout(function () {
   return hardTimeout.unref()
 }, TIMEOUT)
 
-logger.log(
+logger.debug(
   `checking for updates, limit=${LIMIT}, delay=${DOCUMENT_PACK_DELAY}, timeout=${TIMEOUT}`
 )
 
 const finish = function () {
   if (shutDownTimer != null) {
-    logger.log('cancelling timeout')
+    logger.debug('cancelling timeout')
     clearTimeout(shutDownTimer)
   }
-  logger.log('closing db')
+  logger.debug('closing db')
   callbackify(closeDb)(function () {
-    logger.log('closing LockManager Redis Connection')
+    logger.debug('closing LockManager Redis Connection')
     return LockManager.close(function () {
-      logger.log(
+      logger.debug(
         { processedCount: COUNT, allCount: TOTAL },
         'ready to exit from pack archive worker'
       )
@@ -101,7 +101,7 @@ const finish = function () {
   })
 }
 
-process.on('exit', code => logger.log({ code }, 'pack archive worker exited'))
+process.on('exit', code => logger.debug({ code }, 'pack archive worker exited'))
 
 const processUpdates = pending =>
   async.eachSeries(
@@ -110,9 +110,9 @@ const processUpdates = pending =>
       let _id
       ;({ _id, project_id, doc_id } = result)
       COUNT++
-      logger.log({ project_id, doc_id }, `processing ${COUNT}/${TOTAL}`)
+      logger.debug({ project_id, doc_id }, `processing ${COUNT}/${TOTAL}`)
       if (project_id == null || doc_id == null) {
-        logger.log(
+        logger.debug(
           { project_id, doc_id },
           'skipping pack, missing project/doc id'
         )
@@ -164,7 +164,7 @@ const ObjectIdFromDate = function (date) {
 waitForDb()
   .then(() => {
     if (pending != null) {
-      logger.log(`got ${pending.length} entries from ${source}`)
+      logger.debug(`got ${pending.length} entries from ${source}`)
       processUpdates(pending)
     } else {
       processFromOneWeekAgo()
@@ -194,13 +194,13 @@ function processFromOneWeekAgo() {
     .limit(LIMIT)
     .toArray(function (err, results) {
       if (err != null) {
-        logger.log({ err }, 'error checking for updates')
+        logger.debug({ err }, 'error checking for updates')
         finish()
         return
       }
       pending = _.uniq(results, false, result => result.doc_id.toString())
       TOTAL = pending.length
-      logger.log(`found ${TOTAL} documents to archive`)
+      logger.debug(`found ${TOTAL} documents to archive`)
       return processUpdates(pending)
     })
 }
diff --git a/services/track-changes/app/js/RestoreManager.js b/services/track-changes/app/js/RestoreManager.js
index 2556b53afc..07d46712e4 100644
--- a/services/track-changes/app/js/RestoreManager.js
+++ b/services/track-changes/app/js/RestoreManager.js
@@ -20,7 +20,7 @@ module.exports = RestoreManager = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ project_id, doc_id, version, user_id }, 'restoring document')
+    logger.debug({ project_id, doc_id, version, user_id }, 'restoring document')
     return DiffManager.getDocumentBeforeVersion(
       project_id,
       doc_id,
diff --git a/services/track-changes/app/js/UpdateTrimmer.js b/services/track-changes/app/js/UpdateTrimmer.js
index 296c62d382..5481b5f487 100644
--- a/services/track-changes/app/js/UpdateTrimmer.js
+++ b/services/track-changes/app/js/UpdateTrimmer.js
@@ -36,7 +36,7 @@ module.exports = UpdateTrimmer = {
               if (error != null) {
                 return callback(error)
               }
-              logger.log({ project_id, details }, 'got details')
+              logger.debug({ project_id, details }, 'got details')
               if (
                 __guard__(
                   details != null ? details.features : undefined,
diff --git a/services/track-changes/app/js/UpdatesManager.js b/services/track-changes/app/js/UpdatesManager.js
index ca52e34773..58962108cf 100644
--- a/services/track-changes/app/js/UpdatesManager.js
+++ b/services/track-changes/app/js/UpdatesManager.js
@@ -182,7 +182,7 @@ module.exports = UpdatesManager = {
               return callback(error)
             }
             if (result != null) {
-              logger.log(
+              logger.debug(
                 {
                   project_id,
                   doc_id,
@@ -257,7 +257,7 @@ module.exports = UpdatesManager = {
               )
               return callback(error)
             }
-            logger.log(
+            logger.debug(
               { project_id, doc_id, rawUpdates },
               'retrieved raw updates from redis'
             )
@@ -270,7 +270,7 @@ module.exports = UpdatesManager = {
                 if (error != null) {
                   return callback(error)
                 }
-                logger.log(
+                logger.debug(
                   { project_id, doc_id },
                   'compressed and saved doc updates'
                 )
@@ -285,7 +285,7 @@ module.exports = UpdatesManager = {
                     }
                     if (length === UpdatesManager.REDIS_READ_BATCH_SIZE) {
                       // There might be more updates
-                      logger.log(
+                      logger.debug(
                         { project_id, doc_id },
                         'continuing processing updates'
                       )
@@ -300,7 +300,7 @@ module.exports = UpdatesManager = {
                         0
                       )
                     } else {
-                      logger.log(
+                      logger.debug(
                         { project_id, doc_id },
                         'all raw updates processed'
                       )
@@ -416,7 +416,7 @@ module.exports = UpdatesManager = {
       if (error != null) {
         return callback(error)
       }
-      logger.log(
+      logger.debug(
         {
           count: project_ids != null ? project_ids.length : undefined,
           project_ids,
@@ -497,7 +497,7 @@ module.exports = UpdatesManager = {
         return task(function (error, project_doc_ids) {
           if (error) return callback(error)
           const dangling_doc_ids = _.difference(all_doc_ids, project_doc_ids)
-          logger.log(
+          logger.debug(
             { all_doc_ids, all_project_ids, project_doc_ids, dangling_doc_ids },
             'checking for dangling doc ids'
           )
diff --git a/services/track-changes/app/js/WebApiManager.js b/services/track-changes/app/js/WebApiManager.js
index fda1ad2cb4..598c563ba3 100644
--- a/services/track-changes/app/js/WebApiManager.js
+++ b/services/track-changes/app/js/WebApiManager.js
@@ -43,7 +43,7 @@ module.exports = WebApiManager = {
           return callback(error)
         }
         if (res.statusCode === 404) {
-          logger.log({ url }, 'got 404 from web api')
+          logger.debug({ url }, 'got 404 from web api')
           return callback(null, null)
         }
         if (res.statusCode >= 200 && res.statusCode < 300) {
@@ -63,7 +63,7 @@ module.exports = WebApiManager = {
       callback = function () {}
     }
     const url = `/user/${user_id}/personal_info`
-    logger.log({ user_id }, 'getting user info from web')
+    logger.debug({ user_id }, 'getting user info from web')
     return WebApiManager.sendRequest(url, function (error, body) {
       let user
       if (error != null) {
@@ -95,7 +95,7 @@ module.exports = WebApiManager = {
       callback = function () {}
     }
     const url = `/project/${project_id}/details`
-    logger.log({ project_id }, 'getting project details from web')
+    logger.debug({ project_id }, 'getting project details from web')
     return WebApiManager.sendRequest(url, function (error, body) {
       let project
       if (error != null) {
diff --git a/services/track-changes/app/js/ZipManager.js b/services/track-changes/app/js/ZipManager.js
index b302cede97..26d99e6025 100644
--- a/services/track-changes/app/js/ZipManager.js
+++ b/services/track-changes/app/js/ZipManager.js
@@ -33,7 +33,7 @@ async function getLatestContent(projectId, docId, lastUpdateVersion) {
 }
 
 async function rewindDoc(projectId, docId, zipfile) {
-  logger.log({ projectId, docId }, 'rewinding document')
+  logger.debug({ projectId, docId }, 'rewinding document')
 
   // Prepare to rewind content
 
diff --git a/services/web/app.js b/services/web/app.js
index 5975e0b04f..6fee4dfc9b 100644
--- a/services/web/app.js
+++ b/services/web/app.js
@@ -60,8 +60,10 @@ if (!module.parent) {
   Promise.all([mongodb.waitForDb(), mongoose.connectionPromise])
     .then(() => {
       Server.server.listen(port, host, function () {
-        logger.info(`web starting up, listening on ${host}:${port}`)
-        logger.info(`${require('http').globalAgent.maxSockets} sockets enabled`)
+        logger.debug(`web starting up, listening on ${host}:${port}`)
+        logger.debug(
+          `${require('http').globalAgent.maxSockets} sockets enabled`
+        )
         // wait until the process is ready before monitoring the event loop
         metrics.event_loop.monitor(logger)
       })
diff --git a/services/web/app/src/Features/Analytics/AnalyticsManager.js b/services/web/app/src/Features/Analytics/AnalyticsManager.js
index c4beeb6f23..56d4e0dfaa 100644
--- a/services/web/app/src/Features/Analytics/AnalyticsManager.js
+++ b/services/web/app/src/Features/Analytics/AnalyticsManager.js
@@ -65,7 +65,7 @@ function recordEventForSession(session, event, segmentation) {
   if (_isAnalyticsDisabled() || _isSmokeTestUser(userId)) {
     return
   }
-  logger.info({
+  logger.debug({
     analyticsId,
     userId,
     event,
diff --git a/services/web/app/src/Features/Authentication/AuthenticationController.js b/services/web/app/src/Features/Authentication/AuthenticationController.js
index 9bf34345a7..fecaf35299 100644
--- a/services/web/app/src/Features/Authentication/AuthenticationController.js
+++ b/services/web/app/src/Features/Authentication/AuthenticationController.js
@@ -190,7 +190,7 @@ const AuthenticationController = {
             return done(err)
           }
           if (!isAllowed) {
-            logger.log({ email }, 'too many login requests')
+            logger.debug({ email }, 'too many login requests')
             return done(null, null, {
               text: req.i18n.translate('to_many_login_requests_2_mins'),
               type: 'error',
@@ -222,7 +222,7 @@ const AuthenticationController = {
                 done(null, user)
               } else {
                 AuthenticationController._recordFailedLogin()
-                logger.log({ email }, 'failed log in')
+                logger.debug({ email }, 'failed log in')
                 done(null, false, {
                   text: req.i18n.translate('email_or_password_wrong_try_again'),
                   type: 'error',
@@ -372,7 +372,7 @@ const AuthenticationController = {
     } else if (SessionManager.isUserLoggedIn(req.session)) {
       next()
     } else {
-      logger.log(
+      logger.debug(
         { url: req.url },
         'user trying to access endpoint not in global whitelist'
       )
@@ -475,7 +475,7 @@ const AuthenticationController = {
   },
 
   _redirectToLoginPage(req, res) {
-    logger.log(
+    logger.debug(
       { url: req.url },
       'user not logged in so redirecting to login page'
     )
@@ -486,7 +486,7 @@ const AuthenticationController = {
   },
 
   _redirectToReconfirmPage(req, res, user) {
-    logger.log(
+    logger.debug(
       { url: req.url },
       'user needs to reconfirm so redirecting to reconfirm page'
     )
@@ -496,7 +496,7 @@ const AuthenticationController = {
   },
 
   _redirectToRegisterPage(req, res) {
-    logger.log(
+    logger.debug(
       { url: req.url },
       'user not logged in so redirecting to register page'
     )
@@ -617,7 +617,7 @@ function _loginAsyncHandlers(req, user, anonymousAnalyticsId, isNewUser) {
   })
   Analytics.identifyUser(user._id, anonymousAnalyticsId, isNewUser)
 
-  logger.log(
+  logger.debug(
     { email: user.email, user_id: user._id.toString() },
     'successful log in'
   )
diff --git a/services/web/app/src/Features/Authorization/AuthorizationMiddleware.js b/services/web/app/src/Features/Authorization/AuthorizationMiddleware.js
index f43fc493a4..d4f639224b 100644
--- a/services/web/app/src/Features/Authorization/AuthorizationMiddleware.js
+++ b/services/web/app/src/Features/Authorization/AuthorizationMiddleware.js
@@ -64,10 +64,10 @@ async function ensureUserCanReadProject(req, res, next) {
     token
   )
   if (canRead) {
-    logger.log({ userId, projectId }, 'allowing user read access to project')
+    logger.debug({ userId, projectId }, 'allowing user read access to project')
     return next()
   }
-  logger.log({ userId, projectId }, 'denying user read access to project')
+  logger.debug({ userId, projectId }, 'denying user read access to project')
   HttpErrorHandler.forbidden(req, res)
 }
 
@@ -114,13 +114,13 @@ async function ensureUserCanWriteProjectContent(req, res, next) {
       token
     )
   if (canWrite) {
-    logger.log(
+    logger.debug(
       { userId, projectId },
       'allowing user write access to project content'
     )
     return next()
   }
-  logger.log(
+  logger.debug(
     { userId, projectId },
     'denying user write access to project settings'
   )
@@ -137,21 +137,21 @@ async function ensureUserCanAdminProject(req, res, next) {
     token
   )
   if (canAdmin) {
-    logger.log({ userId, projectId }, 'allowing user admin access to project')
+    logger.debug({ userId, projectId }, 'allowing user admin access to project')
     return next()
   }
-  logger.log({ userId, projectId }, 'denying user admin access to project')
+  logger.debug({ userId, projectId }, 'denying user admin access to project')
   HttpErrorHandler.forbidden(req, res)
 }
 
 async function ensureUserIsSiteAdmin(req, res, next) {
   const userId = _getUserId(req)
   if (await AuthorizationManager.promises.isUserSiteAdmin(userId)) {
-    logger.log({ userId }, 'allowing user admin access to site')
+    logger.debug({ userId }, 'allowing user admin access to site')
     return next()
   }
   if (handleAdminDomainRedirect(req, res)) return
-  logger.log({ userId }, 'denying user admin access to site')
+  logger.debug({ userId }, 'denying user admin access to site')
   _redirectToRestricted(req, res, next)
 }
 
@@ -184,7 +184,7 @@ function restricted(req, res, next) {
     return res.render('user/restricted', { title: 'restricted' })
   }
   const { from } = req.query
-  logger.log({ from }, 'redirecting to login')
+  logger.debug({ from }, 'redirecting to login')
   if (from) {
     AuthenticationController.setRedirectInSession(req, from)
   }
diff --git a/services/web/app/src/Features/BetaProgram/BetaProgramController.js b/services/web/app/src/Features/BetaProgram/BetaProgramController.js
index 9c29b87578..64d9dd7070 100644
--- a/services/web/app/src/Features/BetaProgram/BetaProgramController.js
+++ b/services/web/app/src/Features/BetaProgram/BetaProgramController.js
@@ -8,7 +8,7 @@ const SessionManager = require('../Authentication/SessionManager')
 const BetaProgramController = {
   optIn(req, res, next) {
     const userId = SessionManager.getLoggedInUserId(req.session)
-    logger.log({ userId }, 'user opting in to beta program')
+    logger.debug({ userId }, 'user opting in to beta program')
     if (userId == null) {
       return next(new Error('no user id in session'))
     }
@@ -22,7 +22,7 @@ const BetaProgramController = {
 
   optOut(req, res, next) {
     const userId = SessionManager.getLoggedInUserId(req.session)
-    logger.log({ userId }, 'user opting out of beta program')
+    logger.debug({ userId }, 'user opting out of beta program')
     if (userId == null) {
       return next(new Error('no user id in session'))
     }
@@ -36,7 +36,10 @@ const BetaProgramController = {
 
   optInPage(req, res, next) {
     const userId = SessionManager.getLoggedInUserId(req.session)
-    logger.log({ user_id: userId }, 'showing beta participation page for user')
+    logger.debug(
+      { user_id: userId },
+      'showing beta participation page for user'
+    )
     UserGetter.getUser(userId, function (err, user) {
       if (err) {
         OError.tag(err, 'error fetching user', {
diff --git a/services/web/app/src/Features/BrandVariations/BrandVariationsHandler.js b/services/web/app/src/Features/BrandVariations/BrandVariationsHandler.js
index f8ab1836b0..a3c3b452e4 100644
--- a/services/web/app/src/Features/BrandVariations/BrandVariationsHandler.js
+++ b/services/web/app/src/Features/BrandVariations/BrandVariationsHandler.js
@@ -13,7 +13,7 @@ function getBrandVariationById(brandVariationId, callback) {
   if (brandVariationId == null || brandVariationId === '') {
     return callback(new Error('Branding variation id not provided'))
   }
-  logger.log({ brandVariationId }, 'fetching brand variation details from v1')
+  logger.debug({ brandVariationId }, 'fetching brand variation details from v1')
   V1Api.request(
     {
       uri: `/api/v2/brand_variations/${brandVariationId}`,
diff --git a/services/web/app/src/Features/Collaborators/CollaboratorsController.js b/services/web/app/src/Features/Collaborators/CollaboratorsController.js
index 330dae2ae6..69a6583693 100644
--- a/services/web/app/src/Features/Collaborators/CollaboratorsController.js
+++ b/services/web/app/src/Features/Collaborators/CollaboratorsController.js
@@ -39,7 +39,7 @@ async function removeSelfFromProject(req, res, next) {
 
 async function getAllMembers(req, res, next) {
   const projectId = req.params.Project_id
-  logger.log({ projectId }, 'getting all active members for project')
+  logger.debug({ projectId }, 'getting all active members for project')
   let members
   try {
     members = await CollaboratorsGetter.promises.getAllInvitedMembers(projectId)
diff --git a/services/web/app/src/Features/Collaborators/CollaboratorsHandler.js b/services/web/app/src/Features/Collaborators/CollaboratorsHandler.js
index d8d0d1b6e1..446d6878d9 100644
--- a/services/web/app/src/Features/Collaborators/CollaboratorsHandler.js
+++ b/services/web/app/src/Features/Collaborators/CollaboratorsHandler.js
@@ -110,10 +110,13 @@ async function addUserIdToProject(
   }
   if (privilegeLevel === PrivilegeLevels.READ_AND_WRITE) {
     level = { collaberator_refs: userId }
-    logger.log({ privileges: 'readAndWrite', userId, projectId }, 'adding user')
+    logger.debug(
+      { privileges: 'readAndWrite', userId, projectId },
+      'adding user'
+    )
   } else if (privilegeLevel === PrivilegeLevels.READ_ONLY) {
     level = { readOnly_refs: userId }
-    logger.log({ privileges: 'readOnly', userId, projectId }, 'adding user')
+    logger.debug({ privileges: 'readOnly', userId, projectId }, 'adding user')
   } else {
     throw new Error(`unknown privilegeLevel: ${privilegeLevel}`)
   }
@@ -146,7 +149,7 @@ async function transferProjects(fromUserId, toUserId) {
     { _id: 1 }
   ).exec()
   const projectIds = projects.map(p => p._id)
-  logger.log({ projectIds, fromUserId, toUserId }, 'transferring projects')
+  logger.debug({ projectIds, fromUserId, toUserId }, 'transferring projects')
 
   await Project.updateMany(
     { owner_ref: fromUserId },
diff --git a/services/web/app/src/Features/Collaborators/CollaboratorsInviteController.js b/services/web/app/src/Features/Collaborators/CollaboratorsInviteController.js
index 3a27f652e3..04bd4fb482 100644
--- a/services/web/app/src/Features/Collaborators/CollaboratorsInviteController.js
+++ b/services/web/app/src/Features/Collaborators/CollaboratorsInviteController.js
@@ -30,7 +30,7 @@ const rateLimiter = require('../../infrastructure/RateLimiter')
 module.exports = CollaboratorsInviteController = {
   getAllInvites(req, res, next) {
     const projectId = req.params.Project_id
-    logger.log({ projectId }, 'getting all active invites for project')
+    logger.debug({ projectId }, 'getting all active invites for project')
     return CollaboratorsInviteHandler.getAllInvites(
       projectId,
       function (err, invites) {
@@ -50,7 +50,7 @@ module.exports = CollaboratorsInviteController = {
       callback = function () {}
     }
     if (Settings.restrictInvitesToExistingAccounts === true) {
-      logger.log({ email }, 'checking if user exists with this email')
+      logger.debug({ email }, 'checking if user exists with this email')
       return UserGetter.getUserByAnyEmail(
         email,
         { _id: 1 },
@@ -102,13 +102,13 @@ module.exports = CollaboratorsInviteController = {
     const sendingUser = SessionManager.getSessionUser(req.session)
     const sendingUserId = sendingUser._id
     if (email === sendingUser.email) {
-      logger.log(
+      logger.debug(
         { projectId, email, sendingUserId },
         'cannot invite yourself to project'
       )
       return res.json({ invite: null, error: 'cannot_invite_self' })
     }
-    logger.log({ projectId, email, sendingUserId }, 'inviting to project')
+    logger.debug({ projectId, email, sendingUserId }, 'inviting to project')
     return LimitationsManager.canAddXCollaborators(
       projectId,
       1,
@@ -118,7 +118,7 @@ module.exports = CollaboratorsInviteController = {
           return next(error)
         }
         if (!allowed) {
-          logger.log(
+          logger.debug(
             { projectId, email, sendingUserId },
             'not allowed to invite more users to project'
           )
@@ -127,7 +127,7 @@ module.exports = CollaboratorsInviteController = {
         ;({ email, privileges } = req.body)
         email = EmailHelper.parseEmail(email)
         if (email == null || email === '') {
-          logger.log(
+          logger.debug(
             { projectId, email, sendingUserId },
             'invalid email address'
           )
@@ -158,7 +158,7 @@ module.exports = CollaboratorsInviteController = {
                   return next(err)
                 }
                 if (!shouldAllowInvite) {
-                  logger.log(
+                  logger.debug(
                     { email, projectId, sendingUserId },
                     'not allowed to send an invite to this email address'
                   )
@@ -181,7 +181,7 @@ module.exports = CollaboratorsInviteController = {
                       })
                       return next(err)
                     }
-                    logger.log(
+                    logger.debug(
                       { projectId, email, sendingUserId },
                       'invite created'
                     )
@@ -204,7 +204,7 @@ module.exports = CollaboratorsInviteController = {
   revokeInvite(req, res, next) {
     const projectId = req.params.Project_id
     const inviteId = req.params.invite_id
-    logger.log({ projectId, inviteId }, 'revoking invite')
+    logger.debug({ projectId, inviteId }, 'revoking invite')
     return CollaboratorsInviteHandler.revokeInvite(
       projectId,
       inviteId,
@@ -229,7 +229,7 @@ module.exports = CollaboratorsInviteController = {
   resendInvite(req, res, next) {
     const projectId = req.params.Project_id
     const inviteId = req.params.invite_id
-    logger.log({ projectId, inviteId }, 'resending invite')
+    logger.debug({ projectId, inviteId }, 'resending invite')
     const sendingUser = SessionManager.getSessionUser(req.session)
     return CollaboratorsInviteController._checkRateLimit(
       sendingUser._id,
@@ -263,7 +263,7 @@ module.exports = CollaboratorsInviteController = {
     const projectId = req.params.Project_id
     const { token } = req.params
     const _renderInvalidPage = function () {
-      logger.log({ projectId }, 'invite not valid, rendering not-valid page')
+      logger.debug({ projectId }, 'invite not valid, rendering not-valid page')
       return res.render('project/invite/not-valid', { title: 'Invalid Invite' })
     }
     // check if the user is already a member of the project
@@ -279,7 +279,7 @@ module.exports = CollaboratorsInviteController = {
           return next(err)
         }
         if (isMember) {
-          logger.log(
+          logger.debug(
             { projectId, userId: currentUser._id },
             'user is already a member of this project, redirecting'
           )
@@ -298,7 +298,7 @@ module.exports = CollaboratorsInviteController = {
             }
             // check if invite is gone, or otherwise non-existent
             if (invite == null) {
-              logger.log({ projectId }, 'no invite found for this token')
+              logger.debug({ projectId }, 'no invite found for this token')
               return _renderInvalidPage()
             }
             // check the user who sent the invite exists
@@ -313,7 +313,7 @@ module.exports = CollaboratorsInviteController = {
                   return next(err)
                 }
                 if (owner == null) {
-                  logger.log({ projectId }, 'no project owner found')
+                  logger.debug({ projectId }, 'no project owner found')
                   return _renderInvalidPage()
                 }
                 // fetch the project name
@@ -328,7 +328,7 @@ module.exports = CollaboratorsInviteController = {
                       return next(err)
                     }
                     if (project == null) {
-                      logger.log({ projectId }, 'no project found')
+                      logger.debug({ projectId }, 'no project found')
                       return _renderInvalidPage()
                     }
                     // finally render the invite
@@ -352,7 +352,7 @@ module.exports = CollaboratorsInviteController = {
     const projectId = req.params.Project_id
     const { token } = req.params
     const currentUser = SessionManager.getSessionUser(req.session)
-    logger.log(
+    logger.debug(
       { projectId, userId: currentUser._id },
       'got request to accept invite'
     )
diff --git a/services/web/app/src/Features/Collaborators/CollaboratorsInviteHandler.js b/services/web/app/src/Features/Collaborators/CollaboratorsInviteHandler.js
index d117a3891e..42eecb9135 100644
--- a/services/web/app/src/Features/Collaborators/CollaboratorsInviteHandler.js
+++ b/services/web/app/src/Features/Collaborators/CollaboratorsInviteHandler.js
@@ -28,7 +28,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId }, 'fetching invites for project')
+    logger.debug({ projectId }, 'fetching invites for project')
     return ProjectInvite.find({ projectId }, function (err, invites) {
       if (err != null) {
         OError.tag(err, 'error getting invites from mongo', {
@@ -36,7 +36,7 @@ const CollaboratorsInviteHandler = {
         })
         return callback(err)
       }
-      logger.log(
+      logger.debug(
         { projectId, count: invites.length },
         'found invites for project'
       )
@@ -48,7 +48,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId }, 'counting invites for project')
+    logger.debug({ projectId }, 'counting invites for project')
     return ProjectInvite.countDocuments({ projectId }, function (err, count) {
       if (err != null) {
         OError.tag(err, 'error getting invites from mongo', {
@@ -77,7 +77,10 @@ const CollaboratorsInviteHandler = {
           return callback(err)
         }
         if (existingUser == null) {
-          logger.log({ projectId, email }, 'no existing user found, returning')
+          logger.debug(
+            { projectId, email },
+            'no existing user found, returning'
+          )
           return callback(null)
         }
         return ProjectGetter.getProject(
@@ -92,7 +95,7 @@ const CollaboratorsInviteHandler = {
               return callback(err)
             }
             if (project == null) {
-              logger.log(
+              logger.debug(
                 { projectId },
                 'no project found while sending notification, returning'
               )
@@ -126,7 +129,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log(
+    logger.debug(
       { projectId, inviteId: invite._id },
       'sending notification and email for invite'
     )
@@ -158,7 +161,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log(
+    logger.debug(
       { projectId, sendingUserId: sendingUser._id, email, privileges },
       'adding invite'
     )
@@ -211,7 +214,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId, inviteId }, 'removing invite')
+    logger.debug({ projectId, inviteId }, 'removing invite')
     return ProjectInvite.deleteOne(
       { projectId, _id: inviteId },
       function (err) {
@@ -235,7 +238,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId, inviteId }, 'resending invite email')
+    logger.debug({ projectId, inviteId }, 'resending invite email')
     return ProjectInvite.findOne(
       { _id: inviteId, projectId },
       function (err, invite) {
@@ -276,7 +279,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId }, 'fetching invite by token')
+    logger.debug({ projectId }, 'fetching invite by token')
     return ProjectInvite.findOne(
       { projectId, token: tokenString },
       function (err, invite) {
@@ -299,7 +302,7 @@ const CollaboratorsInviteHandler = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ projectId, userId: user._id }, 'accepting invite')
+    logger.debug({ projectId, userId: user._id }, 'accepting invite')
     return CollaboratorsInviteHandler.getInviteByToken(
       projectId,
       tokenString,
@@ -313,7 +316,7 @@ const CollaboratorsInviteHandler = {
         }
         if (!invite) {
           err = new Errors.NotFoundError('no matching invite found')
-          logger.log({ err, projectId }, 'no matching invite found')
+          logger.debug({ err, projectId }, 'no matching invite found')
           return callback(err)
         }
         const inviteId = invite._id
@@ -332,7 +335,7 @@ const CollaboratorsInviteHandler = {
               return callback(err)
             }
             // Remove invite
-            logger.log({ projectId, inviteId }, 'removing invite')
+            logger.debug({ projectId, inviteId }, 'removing invite')
             return ProjectInvite.deleteOne({ _id: inviteId }, function (err) {
               if (err != null) {
                 OError.tag(err, 'error removing invite', {
diff --git a/services/web/app/src/Features/Compile/ClsiManager.js b/services/web/app/src/Features/Compile/ClsiManager.js
index e8c8923cec..c9a73e9eae 100644
--- a/services/web/app/src/Features/Compile/ClsiManager.js
+++ b/services/web/app/src/Features/Compile/ClsiManager.js
@@ -220,7 +220,7 @@ const ClsiManager = {
           )
         }
         if (validationProblems != null) {
-          logger.log(
+          logger.debug(
             { projectId, validationProblems },
             'problems with users latex before compile was attempted'
           )
@@ -395,7 +395,7 @@ const ClsiManager = {
           const currentCompileTime = results.currentBackend.finishTime
           const newBackendCompileTime = results.newBackend.finishTime || 0
           const timeDifference = newBackendCompileTime - currentCompileTime
-          logger.log(
+          logger.debug(
             {
               statusCodeSame,
               timeDifference,
diff --git a/services/web/app/src/Features/Compile/CompileController.js b/services/web/app/src/Features/Compile/CompileController.js
index 451cc52cb8..11d2475138 100644
--- a/services/web/app/src/Features/Compile/CompileController.js
+++ b/services/web/app/src/Features/Compile/CompileController.js
@@ -229,7 +229,7 @@ module.exports = CompileController = {
             logger.err({ err }, 'error checking rate limit for pdf download')
             return res.sendStatus(500)
           } else if (!canContinue) {
-            logger.log(
+            logger.debug(
               { project_id, ip: req.ip },
               'rate limit hit downloading pdf'
             )
diff --git a/services/web/app/src/Features/Cooldown/CooldownManager.js b/services/web/app/src/Features/Cooldown/CooldownManager.js
index 70cb3b4b1a..336f9fad81 100644
--- a/services/web/app/src/Features/Cooldown/CooldownManager.js
+++ b/services/web/app/src/Features/Cooldown/CooldownManager.js
@@ -26,7 +26,7 @@ module.exports = CooldownManager = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log(
+    logger.debug(
       { projectId },
       `[Cooldown] putting project on cooldown for ${COOLDOWN_IN_SECONDS} seconds`
     )
diff --git a/services/web/app/src/Features/Cooldown/CooldownMiddleware.js b/services/web/app/src/Features/Cooldown/CooldownMiddleware.js
index 8d1b456cb4..d9cef35155 100644
--- a/services/web/app/src/Features/Cooldown/CooldownMiddleware.js
+++ b/services/web/app/src/Features/Cooldown/CooldownMiddleware.js
@@ -27,7 +27,7 @@ module.exports = CooldownMiddleware = {
           return next(err)
         }
         if (projectIsOnCooldown) {
-          logger.log(
+          logger.debug(
             { projectId },
             '[Cooldown] project is on cooldown, denying request'
           )
diff --git a/services/web/app/src/Features/Docstore/DocstoreManager.js b/services/web/app/src/Features/Docstore/DocstoreManager.js
index 05f22783cb..6490530971 100644
--- a/services/web/app/src/Features/Docstore/DocstoreManager.js
+++ b/services/web/app/src/Features/Docstore/DocstoreManager.js
@@ -130,7 +130,7 @@ function getDoc(projectId, docId, options, callback) {
       return callback(error)
     }
     if (res.statusCode >= 200 && res.statusCode < 300) {
-      logger.log(
+      logger.debug(
         { docId, projectId, version: doc.version, rev: doc.rev },
         'got doc from docstore api'
       )
@@ -199,7 +199,10 @@ function updateDoc(projectId, docId, lines, version, ranges, callback) {
         return callback(error)
       }
       if (res.statusCode >= 200 && res.statusCode < 300) {
-        logger.log({ projectId, docId }, 'update doc in docstore url finished')
+        logger.debug(
+          { projectId, docId },
+          'update doc in docstore url finished'
+        )
         callback(null, result.modified, result.rev)
       } else {
         error = new OError(
@@ -226,7 +229,7 @@ function destroyProject(projectId, callback) {
 
 function _operateOnProject(projectId, method, callback) {
   const url = `${settings.apis.docstore.url}/project/${projectId}/${method}`
-  logger.log({ projectId }, `calling ${method} for project in docstore`)
+  logger.debug({ projectId }, `calling ${method} for project in docstore`)
   // use default timeout for archiving/unarchiving/destroying
   request.post(url, (err, res, docs) => {
     if (err) {
diff --git a/services/web/app/src/Features/Documents/DocumentController.js b/services/web/app/src/Features/Documents/DocumentController.js
index 069f139f91..9624bea4fd 100644
--- a/services/web/app/src/Features/Documents/DocumentController.js
+++ b/services/web/app/src/Features/Documents/DocumentController.js
@@ -102,7 +102,7 @@ function setDocument(req, res, next) {
         })
         return next(error)
       }
-      logger.log(
+      logger.debug(
         { docId, projectId },
         'finished receiving set document request from api (docupdater)'
       )
diff --git a/services/web/app/src/Features/Downloads/ProjectZipStreamManager.js b/services/web/app/src/Features/Downloads/ProjectZipStreamManager.js
index 735b57dacb..a5e57a4f9c 100644
--- a/services/web/app/src/Features/Downloads/ProjectZipStreamManager.js
+++ b/services/web/app/src/Features/Downloads/ProjectZipStreamManager.js
@@ -24,13 +24,13 @@ module.exports = ProjectZipStreamManager = {
           return cb(error)
         }
         if (!project) {
-          logger.log(
+          logger.debug(
             { projectId },
             'cannot append project to zip stream: project not found'
           )
           return cb()
         }
-        logger.log(
+        logger.debug(
           { projectId, name: project.name },
           'appending project to zip stream'
         )
@@ -42,7 +42,10 @@ module.exports = ProjectZipStreamManager = {
             }
             archive.append(stream, { name: `${project.name}.zip` })
             stream.on('end', () => {
-              logger.log({ projectId, name: project.name }, 'zip stream ended')
+              logger.debug(
+                { projectId, name: project.name },
+                'zip stream ended'
+              )
               cb()
             })
           }
@@ -51,7 +54,7 @@ module.exports = ProjectZipStreamManager = {
     })
 
     async.series(jobs, () => {
-      logger.log(
+      logger.debug(
         { projectIds },
         'finished creating zip stream of multiple projects'
       )
@@ -97,7 +100,7 @@ module.exports = ProjectZipStreamManager = {
         if (path[0] === '/') {
           path = path.slice(1)
         }
-        logger.log({ projectId }, 'Adding doc')
+        logger.debug({ projectId }, 'Adding doc')
         archive.append(doc.lines.join('\n'), { name: path })
         setImmediate(cb)
       })
diff --git a/services/web/app/src/Features/Editor/EditorController.js b/services/web/app/src/Features/Editor/EditorController.js
index 6fc8959bdd..2598ae7c1b 100644
--- a/services/web/app/src/Features/Editor/EditorController.js
+++ b/services/web/app/src/Features/Editor/EditorController.js
@@ -356,7 +356,7 @@ const EditorController = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ project_id, path }, "making directories if they don't exist")
+    logger.debug({ project_id, path }, "making directories if they don't exist")
     return ProjectEntityUpdateHandler.mkdirp(
       project_id,
       path,
@@ -402,7 +402,7 @@ const EditorController = {
           })
           return callback(err)
         }
-        logger.log(
+        logger.debug(
           { project_id, entity_id, entityType },
           'telling users entity has been deleted'
         )
@@ -441,7 +441,7 @@ const EditorController = {
     if (callback == null) {
       callback = function () {}
     }
-    logger.log({ project_id, description }, 'updating project description')
+    logger.debug({ project_id, description }, 'updating project description')
     return ProjectDetailsHandler.setProjectDescription(
       project_id,
       description,
diff --git a/services/web/app/src/Features/Email/EmailSender.js b/services/web/app/src/Features/Email/EmailSender.js
index 9a9aa5380b..93ee7a5724 100644
--- a/services/web/app/src/Features/Email/EmailSender.js
+++ b/services/web/app/src/Features/Email/EmailSender.js
@@ -25,14 +25,14 @@ function getClient() {
   if (EMAIL_SETTINGS.parameters) {
     const emailParameters = EMAIL_SETTINGS.parameters
     if (emailParameters.AWSAccessKeyID || EMAIL_SETTINGS.driver === 'ses') {
-      logger.log('using aws ses for email')
+      logger.debug('using aws ses for email')
       client = nodemailer.createTransport(sesTransport(emailParameters))
     } else if (emailParameters.sendgridApiKey) {
       throw new OError(
         'sendgridApiKey configuration option is deprecated, use SMTP instead'
       )
     } else if (emailParameters.MandrillApiKey) {
-      logger.log('using mandril for email')
+      logger.debug('using mandril for email')
       client = nodemailer.createTransport(
         mandrillTransport({
           auth: {
@@ -41,7 +41,7 @@ function getClient() {
         })
       )
     } else {
-      logger.log('using smtp for email')
+      logger.debug('using smtp for email')
       const smtp = _.pick(
         emailParameters,
         'host',
@@ -60,7 +60,7 @@ function getClient() {
     )
     client = {
       async sendMail(options) {
-        logger.log({ options }, 'Would send email if enabled.')
+        logger.debug({ options }, 'Would send email if enabled.')
       },
     }
   }
@@ -71,7 +71,7 @@ async function sendEmail(options) {
   try {
     const canContinue = await checkCanSendEmail(options)
     if (!canContinue) {
-      logger.log(
+      logger.debug(
         {
           sendingUser_id: options.sendingUser_id,
           to: options.to,
diff --git a/services/web/app/src/Features/Exports/ExportsController.js b/services/web/app/src/Features/Exports/ExportsController.js
index 01e1a358c0..51899f620c 100644
--- a/services/web/app/src/Features/Exports/ExportsController.js
+++ b/services/web/app/src/Features/Exports/ExportsController.js
@@ -54,7 +54,7 @@ module.exports = {
       function (err, export_data) {
         if (err != null) {
           if (err.forwardResponse != null) {
-            logger.log(
+            logger.debug(
               { responseError: err.forwardResponse },
               'forwarding response'
             )
@@ -64,7 +64,7 @@ module.exports = {
             return next(err)
           }
         }
-        logger.log(
+        logger.debug(
           {
             user_id,
             project_id,
diff --git a/services/web/app/src/Features/FileStore/FileStoreHandler.js b/services/web/app/src/Features/FileStore/FileStoreHandler.js
index 85aac4d748..def67f5823 100644
--- a/services/web/app/src/Features/FileStore/FileStoreHandler.js
+++ b/services/web/app/src/Features/FileStore/FileStoreHandler.js
@@ -30,7 +30,7 @@ const FileStoreHandler = {
         return callback(new Error('error getting stat, not available'))
       }
       if (!stat.isFile()) {
-        logger.log(
+        logger.debug(
           { projectId, fileArgs, fsPath },
           'tried to upload symlink, not continuing'
         )
@@ -162,7 +162,7 @@ const FileStoreHandler = {
   },
 
   deleteFile(projectId, fileId, callback) {
-    logger.log({ projectId, fileId }, 'telling file store to delete file')
+    logger.debug({ projectId, fileId }, 'telling file store to delete file')
     const opts = {
       method: 'delete',
       uri: this._buildUrl(projectId, fileId),
@@ -202,7 +202,7 @@ const FileStoreHandler = {
   },
 
   copyFile(oldProjectId, oldFileId, newProjectId, newFileId, callback) {
-    logger.log(
+    logger.debug(
       { oldProjectId, oldFileId, newProjectId, newFileId },
       'telling filestore to copy a file'
     )
diff --git a/services/web/app/src/Features/InactiveData/InactiveProjectManager.js b/services/web/app/src/Features/InactiveData/InactiveProjectManager.js
index afc808ca9f..6190f831df 100644
--- a/services/web/app/src/Features/InactiveData/InactiveProjectManager.js
+++ b/services/web/app/src/Features/InactiveData/InactiveProjectManager.js
@@ -34,7 +34,7 @@ module.exports = InactiveProjectManager = {
           })
           return callback(err)
         }
-        logger.log(
+        logger.debug(
           { project_id, active: project.active },
           'seeing if need to reactivate project'
         )
@@ -94,7 +94,7 @@ module.exports = InactiveProjectManager = {
               }
             )
         )
-        logger.log(
+        logger.debug(
           { numberOfProjects: projects && projects.length },
           'deactivating projects'
         )
@@ -108,7 +108,7 @@ module.exports = InactiveProjectManager = {
   },
 
   deactivateProject(project_id, callback) {
-    logger.log({ project_id }, 'deactivating inactive project')
+    logger.debug({ project_id }, 'deactivating inactive project')
     const jobs = [
       cb => DocstoreManager.archiveProject(project_id, cb),
       cb => ProjectUpdateHandler.markAsInactive(project_id, cb),
diff --git a/services/web/app/src/Features/Metadata/MetaController.js b/services/web/app/src/Features/Metadata/MetaController.js
index 44173b461c..6697af93df 100644
--- a/services/web/app/src/Features/Metadata/MetaController.js
+++ b/services/web/app/src/Features/Metadata/MetaController.js
@@ -20,7 +20,7 @@ const logger = require('@overleaf/logger')
 module.exports = MetaController = {
   getMetadata(req, res, next) {
     const { project_id } = req.params
-    logger.log({ project_id }, 'getting all labels for project')
+    logger.debug({ project_id }, 'getting all labels for project')
     return MetaHandler.getAllMetaForProject(
       project_id,
       function (err, projectMeta) {
@@ -43,7 +43,7 @@ module.exports = MetaController = {
     const { project_id } = req.params
     const { doc_id } = req.params
     const { broadcast } = req.body
-    logger.log({ project_id, doc_id, broadcast }, 'getting labels for doc')
+    logger.debug({ project_id, doc_id, broadcast }, 'getting labels for doc')
     return MetaHandler.getMetaForDoc(
       project_id,
       doc_id,
diff --git a/services/web/app/src/Features/Newsletter/NewsletterManager.js b/services/web/app/src/Features/Newsletter/NewsletterManager.js
index 7f05d5b7b4..18ac40dd5f 100644
--- a/services/web/app/src/Features/Newsletter/NewsletterManager.js
+++ b/services/web/app/src/Features/Newsletter/NewsletterManager.js
@@ -23,10 +23,10 @@ class NonFatalEmailUpdateError extends OError {
 
 function getProvider() {
   if (mailchimpIsConfigured()) {
-    logger.info('Using newsletter provider: mailchimp')
+    logger.debug('Using newsletter provider: mailchimp')
     return makeMailchimpProvider()
   } else {
-    logger.info('Using newsletter provider: none')
+    logger.debug('Using newsletter provider: none')
     return makeNullProvider()
   }
 }
@@ -70,7 +70,7 @@ function makeMailchimpProvider() {
         status_if_new: 'subscribed',
         merge_fields: getMergeFields(user),
       })
-      logger.info({ user }, 'finished subscribing user to newsletter')
+      logger.debug({ user }, 'finished subscribing user to newsletter')
     } catch (err) {
       throw OError.tag(err, 'error subscribing user to newsletter', {
         userId: user._id,
@@ -89,7 +89,7 @@ function makeMailchimpProvider() {
           merge_fields: getMergeFields(user),
         })
       }
-      logger.info(
+      logger.debug(
         { user, options },
         'finished unsubscribing user from newsletter'
       )
@@ -100,7 +100,7 @@ function makeMailchimpProvider() {
       }
 
       if (err.message.includes('looks fake or invalid')) {
-        logger.info(
+        logger.debug(
           { err, user, options },
           'Mailchimp declined to unsubscribe user because it finds the email looks fake'
         )
@@ -121,7 +121,7 @@ function makeMailchimpProvider() {
     } catch (updateError) {
       // if we failed to update the user, delete their old email address so that
       // we don't leave it stuck in mailchimp
-      logger.info(
+      logger.debug(
         { oldEmail, newEmail, updateError },
         'unable to change email in newsletter, removing old mail'
       )
@@ -161,7 +161,7 @@ function makeMailchimpProvider() {
         email_address: newEmail,
         merge_fields: getMergeFields(user),
       })
-      logger.info('finished changing email in the newsletter')
+      logger.debug('finished changing email in the newsletter')
     } catch (err) {
       // silently ignore users who were never subscribed
       if (err.status === 404) {
@@ -173,7 +173,7 @@ function makeMailchimpProvider() {
         if (err.message.includes(key)) {
           const message = `unable to change email in newsletter, ${errors[key]}`
 
-          logger.info({ oldEmail, newEmail }, message)
+          logger.debug({ oldEmail, newEmail }, message)
 
           throw new NonFatalEmailUpdateError(
             message,
@@ -218,7 +218,7 @@ function makeNullProvider() {
   }
 
   async function subscribed(user) {
-    logger.info(
+    logger.debug(
       { user },
       'Not checking user because no newsletter provider is configured'
     )
@@ -226,21 +226,21 @@ function makeNullProvider() {
   }
 
   async function subscribe(user) {
-    logger.info(
+    logger.debug(
       { user },
       'Not subscribing user to newsletter because no newsletter provider is configured'
     )
   }
 
   async function unsubscribe(user) {
-    logger.info(
+    logger.debug(
       { user },
       'Not unsubscribing user from newsletter because no newsletter provider is configured'
     )
   }
 
   async function changeEmail(oldEmail, newEmail) {
-    logger.info(
+    logger.debug(
       { oldEmail, newEmail },
       'Not changing email in newsletter for user because no newsletter provider is configured'
     )
diff --git a/services/web/app/src/Features/Project/ProjectController.js b/services/web/app/src/Features/Project/ProjectController.js
index b4bae7d2ec..5f5402f9c6 100644
--- a/services/web/app/src/Features/Project/ProjectController.js
+++ b/services/web/app/src/Features/Project/ProjectController.js
@@ -247,7 +247,7 @@ const ProjectController = {
     metrics.inc('cloned-project')
     const projectId = req.params.Project_id
     const { projectName } = req.body
-    logger.log({ projectId, projectName }, 'cloning project')
+    logger.debug({ projectId, projectName }, 'cloning project')
     if (!SessionManager.isUserLoggedIn(req.session)) {
       return res.json({ redir: '/register' })
     }
@@ -743,7 +743,7 @@ const ProjectController = {
                 if (err) {
                   return cb(err)
                 }
-                logger.log({ projectId, userId }, 'got user')
+                logger.debug({ projectId, userId }, 'got user')
                 if (FeaturesUpdater.featuresEpochIsCurrent(user)) {
                   return cb(null, user)
                 }
diff --git a/services/web/app/src/Features/Project/ProjectDeleter.js b/services/web/app/src/Features/Project/ProjectDeleter.js
index fd290e1ac2..33db60479d 100644
--- a/services/web/app/src/Features/Project/ProjectDeleter.js
+++ b/services/web/app/src/Features/Project/ProjectDeleter.js
@@ -56,7 +56,7 @@ module.exports = {
 }
 
 async function markAsDeletedByExternalSource(projectId) {
-  logger.log(
+  logger.debug(
     { project_id: projectId },
     'marking project as deleted by external data source'
   )
@@ -277,7 +277,7 @@ async function deleteProject(projectId, options = {}) {
     throw err
   }
 
-  logger.log({ project_id: projectId }, 'successfully deleted project')
+  logger.debug({ project_id: projectId }, 'successfully deleted project')
 }
 
 async function undeleteProject(projectId, options = {}) {
diff --git a/services/web/app/src/Features/Project/ProjectDetailsHandler.js b/services/web/app/src/Features/Project/ProjectDetailsHandler.js
index 6abd6a7c68..48de5f01a3 100644
--- a/services/web/app/src/Features/Project/ProjectDetailsHandler.js
+++ b/services/web/app/src/Features/Project/ProjectDetailsHandler.js
@@ -85,7 +85,7 @@ async function getProjectDescription(projectId) {
 async function setProjectDescription(projectId, description) {
   const conditions = { _id: projectId }
   const update = { description }
-  logger.log(
+  logger.debug(
     { conditions, update, projectId, description },
     'setting project description'
   )
@@ -99,7 +99,7 @@ async function setProjectDescription(projectId, description) {
 async function renameProject(projectId, newName) {
   newName = newName.trim()
   await validateProjectName(newName)
-  logger.log({ projectId, newName }, 'renaming project')
+  logger.debug({ projectId, newName }, 'renaming project')
   let project
   try {
     project = await ProjectGetter.promises.getProject(projectId, { name: true })
diff --git a/services/web/app/src/Features/Project/ProjectEntityUpdateHandler.js b/services/web/app/src/Features/Project/ProjectEntityUpdateHandler.js
index 50a41d1a96..5bb7ec5d37 100644
--- a/services/web/app/src/Features/Project/ProjectEntityUpdateHandler.js
+++ b/services/web/app/src/Features/Project/ProjectEntityUpdateHandler.js
@@ -117,7 +117,7 @@ function getDocContext(projectId, docId, callback) {
                     //  3. web triggers (soft)-delete in docstore
                     // Specifically when an update comes in after 1
                     //  and before 3 completes.
-                    logger.info(
+                    logger.debug(
                       { projectId, docId },
                       'updating doc that is in process of getting soft-deleted'
                     )
@@ -174,7 +174,10 @@ const ProjectEntityUpdateHandler = {
         return callback(err)
       }
       const { projectName, isDeletedDoc, path } = ctx
-      logger.log({ projectId, docId }, 'telling docstore manager to update doc')
+      logger.debug(
+        { projectId, docId },
+        'telling docstore manager to update doc'
+      )
       DocstoreManager.updateDoc(
         projectId,
         docId,
@@ -189,7 +192,7 @@ const ProjectEntityUpdateHandler = {
             })
             return callback(err)
           }
-          logger.log(
+          logger.debug(
             { projectId, docId, modified },
             'finished updating doc lines'
           )
@@ -219,7 +222,7 @@ const ProjectEntityUpdateHandler = {
   },
 
   setRootDoc(projectId, newRootDocID, callback) {
-    logger.log({ projectId, rootDocId: newRootDocID }, 'setting root doc')
+    logger.debug({ projectId, rootDocId: newRootDocID }, 'setting root doc')
     if (projectId == null || newRootDocID == null) {
       return callback(
         new Errors.InvalidError('missing arguments (project or doc)')
@@ -251,7 +254,7 @@ const ProjectEntityUpdateHandler = {
   },
 
   unsetRootDoc(projectId, callback) {
-    logger.log({ projectId }, 'removing root doc')
+    logger.debug({ projectId }, 'removing root doc')
     Project.updateOne(
       { _id: projectId },
       { $unset: { rootDoc_id: true } },
@@ -758,7 +761,7 @@ const ProjectEntityUpdateHandler = {
               if (err != null) {
                 return callback(err)
               }
-              logger.log(
+              logger.debug(
                 { projectId, docId: existingDoc._id },
                 'notifying users that the document has been updated'
               )
@@ -1109,7 +1112,7 @@ const ProjectEntityUpdateHandler = {
     userId,
     callback
   ) {
-    logger.log({ entityId, entityType, projectId }, 'deleting project entity')
+    logger.debug({ entityId, entityType, projectId }, 'deleting project entity')
     if (entityType == null) {
       logger.warn({ err: 'No entityType set', projectId, entityId })
       return callback(new Error('No entityType set'))
@@ -1227,7 +1230,7 @@ const ProjectEntityUpdateHandler = {
     userId,
     callback
   ) {
-    logger.log(
+    logger.debug(
       { entityType, entityId, projectId, destFolderId },
       'moving entity'
     )
@@ -1283,7 +1286,7 @@ const ProjectEntityUpdateHandler = {
     if (!SafePath.isCleanFilename(newName)) {
       return callback(new Errors.InvalidNameError('invalid element name'))
     }
-    logger.log({ entityId, projectId }, `renaming ${entityType}`)
+    logger.debug({ entityId, projectId }, `renaming ${entityType}`)
     if (entityType == null) {
       logger.warn({ err: 'No entityType set', projectId, entityId })
       return callback(new Error('No entityType set'))
diff --git a/services/web/app/src/Features/References/ReferencesHandler.js b/services/web/app/src/Features/References/ReferencesHandler.js
index d8312d9e1b..7b86e36d9a 100644
--- a/services/web/app/src/Features/References/ReferencesHandler.js
+++ b/services/web/app/src/Features/References/ReferencesHandler.js
@@ -29,7 +29,7 @@ const oneMinInMs = 60 * 1000
 const fiveMinsInMs = oneMinInMs * 5
 
 if (!Features.hasFeature('references')) {
-  logger.log('references search not enabled')
+  logger.debug('references search not enabled')
 }
 
 module.exports = ReferencesHandler = {
@@ -117,7 +117,7 @@ module.exports = ReferencesHandler = {
             new Errors.NotFoundError(`project does not exist: ${projectId}`)
           )
         }
-        logger.log({ projectId }, 'indexing all bib files in project')
+        logger.debug({ projectId }, 'indexing all bib files in project')
         const docIds = ReferencesHandler._findBibDocIds(project)
         const fileIds = ReferencesHandler._findBibFileIds(project)
         return ReferencesHandler._doIndexOperation(
@@ -172,7 +172,7 @@ module.exports = ReferencesHandler = {
         })
         return callback(err)
       }
-      logger.log(
+      logger.debug(
         { projectId, docIds },
         'flushing docs to mongo before calling references service'
       )
@@ -213,7 +213,7 @@ module.exports = ReferencesHandler = {
                 return callback(err)
               }
               if (res.statusCode >= 200 && res.statusCode < 300) {
-                logger.log({ projectId }, 'got keys from references api')
+                logger.debug({ projectId }, 'got keys from references api')
                 return callback(null, data)
               } else {
                 err = new Error(
diff --git a/services/web/app/src/Features/ServerAdmin/AdminController.js b/services/web/app/src/Features/ServerAdmin/AdminController.js
index 11f09b5313..b42ec2d7f0 100644
--- a/services/web/app/src/Features/ServerAdmin/AdminController.js
+++ b/services/web/app/src/Features/ServerAdmin/AdminController.js
@@ -127,10 +127,10 @@ const AdminController = {
   },
 
   writeAllToMongo(req, res) {
-    logger.log('writing all docs to mongo')
+    logger.debug('writing all docs to mongo')
     Settings.mongo.writeAll = true
     return DocumentUpdaterHandler.flushAllDocsToMongo(function () {
-      logger.log('all docs have been saved to mongo')
+      logger.debug('all docs have been saved to mongo')
       return res.sendStatus(200)
     })
   },
diff --git a/services/web/app/src/Features/Spelling/SpellingController.js b/services/web/app/src/Features/Spelling/SpellingController.js
index 22daa50b3f..84efab4f55 100644
--- a/services/web/app/src/Features/Spelling/SpellingController.js
+++ b/services/web/app/src/Features/Spelling/SpellingController.js
@@ -33,7 +33,7 @@ module.exports = {
       if (!languageCodeIsSupported(language)) {
         // this log statement can be changed to 'error' once projects with
         // unsupported languages are removed from the DB
-        logger.info({ language }, 'language not supported')
+        logger.debug({ language }, 'language not supported')
         return res.status(422).json({ misspellings: [] })
       }
     }
diff --git a/services/web/app/src/Features/Subscription/FeaturesUpdater.js b/services/web/app/src/Features/Subscription/FeaturesUpdater.js
index 0f418fceb5..91e8ef4e23 100644
--- a/services/web/app/src/Features/Subscription/FeaturesUpdater.js
+++ b/services/web/app/src/Features/Subscription/FeaturesUpdater.js
@@ -39,7 +39,7 @@ async function refreshFeatures(userId, reason) {
   })
   const oldFeatures = _.clone(user.features)
   const features = await computeFeatures(userId)
-  logger.log({ userId, features }, 'updating user features')
+  logger.debug({ userId, features }, 'updating user features')
 
   const matchedFeatureSet = FeaturesHelper.getMatchedFeatureSet(features)
   AnalyticsManager.setUserPropertyForUser(
@@ -51,7 +51,7 @@ async function refreshFeatures(userId, reason) {
   const { features: newFeatures, featuresChanged } =
     await UserFeaturesUpdater.promises.updateFeatures(userId, features)
   if (oldFeatures.dropbox === true && features.dropbox === false) {
-    logger.log({ userId }, '[FeaturesUpdater] must unlink dropbox')
+    logger.debug({ userId }, '[FeaturesUpdater] must unlink dropbox')
     const Modules = require('../../infrastructure/Modules')
     try {
       await Modules.promises.hooks.fire('removeDropbox', userId, reason)
@@ -77,7 +77,7 @@ async function computeFeatures(userId) {
   const v1Features = await _getV1Features(user)
   const bonusFeatures = await ReferalFeatures.promises.getBonusFeatures(userId)
   const featuresOverrides = await _getFeaturesOverrides(user)
-  logger.log(
+  logger.debug(
     {
       userId,
       individualFeatures,
@@ -161,7 +161,7 @@ function _planCodeToFeatures(planCode) {
 }
 
 async function doSyncFromV1(v1UserId) {
-  logger.log({ v1UserId }, '[AccountSync] starting account sync')
+  logger.debug({ v1UserId }, '[AccountSync] starting account sync')
   const user = await UserGetter.promises.getUser(
     { 'overleaf.id': v1UserId },
     { _id: 1 }
@@ -170,7 +170,7 @@ async function doSyncFromV1(v1UserId) {
     logger.warn({ v1UserId }, '[AccountSync] no user found for v1 id')
     return
   }
-  logger.log(
+  logger.debug(
     { v1UserId, userId: user._id },
     '[AccountSync] updating user subscription and features'
   )
diff --git a/services/web/app/src/Features/Subscription/RecurlyClient.js b/services/web/app/src/Features/Subscription/RecurlyClient.js
index 5be35ee39d..ab8f7c7db3 100644
--- a/services/web/app/src/Features/Subscription/RecurlyClient.js
+++ b/services/web/app/src/Features/Subscription/RecurlyClient.js
@@ -36,7 +36,7 @@ async function createAccountForUserId(userId) {
     lastName: user.last_name,
   }
   const account = await client.createAccount(accountCreate)
-  logger.log({ userId, account }, 'created recurly account')
+  logger.debug({ userId, account }, 'created recurly account')
   return account
 }
 
@@ -46,7 +46,7 @@ async function getSubscription(subscriptionId) {
 
 async function changeSubscription(subscriptionId, body) {
   const change = await client.createSubscriptionChange(subscriptionId, body)
-  logger.log(
+  logger.debug(
     { subscriptionId, changeId: change.id },
     'created subscription change'
   )
@@ -59,7 +59,7 @@ async function changeSubscriptionByUuid(subscriptionUuid, ...args) {
 
 async function removeSubscriptionChange(subscriptionId) {
   const removed = await client.removeSubscriptionChange(subscriptionId)
-  logger.log({ subscriptionId }, 'removed pending subscription change')
+  logger.debug({ subscriptionId }, 'removed pending subscription change')
   return removed
 }
 
@@ -79,7 +79,7 @@ async function cancelSubscriptionByUuid(subscriptionUuid) {
       if (
         err.message === 'Only active and future subscriptions can be canceled.'
       ) {
-        logger.log(
+        logger.debug(
           { subscriptionUuid },
           'subscription cancellation failed, subscription not active'
         )
diff --git a/services/web/app/src/Features/Subscription/RecurlyWrapper.js b/services/web/app/src/Features/Subscription/RecurlyWrapper.js
index a3c4400b23..ec5f1f405d 100644
--- a/services/web/app/src/Features/Subscription/RecurlyWrapper.js
+++ b/services/web/app/src/Features/Subscription/RecurlyWrapper.js
@@ -62,7 +62,7 @@ const RecurlyWrapper = {
     checkAccountExists(cache, next) {
       const { user } = cache
       const { subscriptionDetails } = cache
-      logger.log(
+      logger.debug(
         { user_id: user._id },
         'checking if recurly account exists for user'
       )
@@ -85,14 +85,17 @@ const RecurlyWrapper = {
           }
           if (response.statusCode === 404) {
             // actually not an error in this case, just no existing account
-            logger.log(
+            logger.debug(
               { user_id: user._id },
               'user does not currently exist in recurly, proceed'
             )
             cache.userExists = false
             return next(null, cache)
           }
-          logger.log({ user_id: user._id }, 'user appears to exist in recurly')
+          logger.debug(
+            { user_id: user._id },
+            'user appears to exist in recurly'
+          )
           return RecurlyWrapper._parseAccountXml(
             responseBody,
             function (err, account) {
@@ -176,7 +179,7 @@ const RecurlyWrapper = {
       const { user } = cache
       const { recurlyTokenIds } = cache
       const { subscriptionDetails } = cache
-      logger.log({ user_id: user._id }, 'creating billing info in recurly')
+      logger.debug({ user_id: user._id }, 'creating billing info in recurly')
       const accountCode = __guard__(
         cache != null ? cache.account : undefined,
         x1 => x1.account_code
@@ -231,7 +234,7 @@ const RecurlyWrapper = {
     setAddressAndCompanyBillingInfo(cache, next) {
       const { user } = cache
       const { subscriptionDetails } = cache
-      logger.log(
+      logger.debug(
         { user_id: user._id },
         'setting billing address and company info in recurly'
       )
@@ -303,7 +306,7 @@ const RecurlyWrapper = {
     createSubscription(cache, next) {
       const { user } = cache
       const { subscriptionDetails } = cache
-      logger.log({ user_id: user._id }, 'creating subscription in recurly')
+      logger.debug({ user_id: user._id }, 'creating subscription in recurly')
       const data = {
         plan_code: subscriptionDetails.plan_code,
         currency: subscriptionDetails.currencyCode,
@@ -367,7 +370,7 @@ const RecurlyWrapper = {
     recurlyTokenIds,
     callback
   ) {
-    logger.log(
+    logger.debug(
       { user_id: user._id },
       'starting process of creating paypal subscription'
     )
@@ -397,7 +400,7 @@ const RecurlyWrapper = {
           })
           return callback(err)
         }
-        logger.log(
+        logger.debug(
           { user_id: user._id },
           'done creating paypal subscription for user'
         )
@@ -467,7 +470,7 @@ const RecurlyWrapper = {
 
   createSubscription(user, subscriptionDetails, recurlyTokenIds, callback) {
     const { isPaypal } = subscriptionDetails
-    logger.log(
+    logger.debug(
       { user_id: user._id, isPaypal },
       'setting up subscription in recurly'
     )
@@ -615,7 +618,7 @@ const RecurlyWrapper = {
           }
           const items = data[resource]
           allItems = allItems.concat(items)
-          logger.log(
+          logger.debug(
             `got another ${items.length}, total now ${allItems.length}`
           )
           cursor = __guard__(
@@ -736,7 +739,7 @@ const RecurlyWrapper = {
   },
 
   updateSubscription(subscriptionId, options, callback) {
-    logger.log(
+    logger.debug(
       { subscriptionId, options },
       'telling recurly to update subscription'
     )
@@ -796,7 +799,7 @@ const RecurlyWrapper = {
       )
     }
 
-    logger.log({ coupon_code, requestBody }, 'creating coupon')
+    logger.debug({ coupon_code, requestBody }, 'creating coupon')
     return RecurlyWrapper.apiRequest(
       {
         url: 'coupons',
@@ -840,7 +843,7 @@ const RecurlyWrapper = {
       )
     }
 
-    logger.log(
+    logger.debug(
       { account_code, coupon_code, requestBody },
       'redeeming coupon for user'
     )
@@ -868,7 +871,7 @@ const RecurlyWrapper = {
     }
     const next_renewal_date = new Date()
     next_renewal_date.setDate(next_renewal_date.getDate() + daysUntilExpire)
-    logger.log(
+    logger.debug(
       { subscriptionId, daysUntilExpire },
       'Exending Free trial for user'
     )
diff --git a/services/web/app/src/Features/Subscription/SubscriptionController.js b/services/web/app/src/Features/Subscription/SubscriptionController.js
index 8d2b95d968..334d1721bd 100644
--- a/services/web/app/src/Features/Subscription/SubscriptionController.js
+++ b/services/web/app/src/Features/Subscription/SubscriptionController.js
@@ -285,7 +285,7 @@ function successfulSubscription(req, res, next) {
 
 function cancelSubscription(req, res, next) {
   const user = SessionManager.getSessionUser(req.session)
-  logger.log({ user_id: user._id }, 'canceling subscription')
+  logger.debug({ user_id: user._id }, 'canceling subscription')
   SubscriptionHandler.cancelSubscription(user, function (err) {
     if (err) {
       OError.tag(err, 'something went wrong canceling subscription', {
@@ -307,7 +307,7 @@ function canceledSubscription(req, res, next) {
 
 function cancelV1Subscription(req, res, next) {
   const userId = SessionManager.getLoggedInUserId(req.session)
-  logger.log({ userId }, 'canceling v1 subscription')
+  logger.debug({ userId }, 'canceling v1 subscription')
   V1SubscriptionManager.cancelV1Subscription(userId, function (err) {
     if (err) {
       OError.tag(err, 'something went wrong canceling v1 subscription', {
@@ -331,7 +331,7 @@ function updateSubscription(req, res, next) {
     )
     return next(err)
   }
-  logger.log({ planCode, user_id: user._id }, 'updating subscription')
+  logger.debug({ planCode, user_id: user._id }, 'updating subscription')
   SubscriptionHandler.updateSubscription(user, planCode, null, function (err) {
     if (err) {
       OError.tag(err, 'something went wrong updating subscription', {
@@ -345,7 +345,7 @@ function updateSubscription(req, res, next) {
 
 function cancelPendingSubscriptionChange(req, res, next) {
   const user = SessionManager.getSessionUser(req.session)
-  logger.log({ user_id: user._id }, 'canceling pending subscription change')
+  logger.debug({ user_id: user._id }, 'canceling pending subscription change')
   SubscriptionHandler.cancelPendingSubscriptionChange(user, function (err) {
     if (err) {
       OError.tag(
@@ -377,7 +377,7 @@ function updateAccountEmailAddress(req, res, next) {
 
 function reactivateSubscription(req, res, next) {
   const user = SessionManager.getSessionUser(req.session)
-  logger.log({ user_id: user._id }, 'reactivating subscription')
+  logger.debug({ user_id: user._id }, 'reactivating subscription')
   SubscriptionHandler.reactivateSubscription(user, function (err) {
     if (err) {
       OError.tag(err, 'something went wrong reactivating subscription', {
@@ -390,7 +390,7 @@ function reactivateSubscription(req, res, next) {
 }
 
 function recurlyCallback(req, res, next) {
-  logger.log({ data: req.body }, 'received recurly callback')
+  logger.debug({ data: req.body }, 'received recurly callback')
   const event = Object.keys(req.body)[0]
   const eventData = req.body[event]
 
@@ -473,7 +473,7 @@ function processUpgradeToAnnualPlan(req, res, next) {
   const { planName } = req.body
   const couponCode = Settings.coupon_codes.upgradeToAnnualPromo[planName]
   const annualPlanName = `${planName}-annual`
-  logger.log(
+  logger.debug(
     { user_id: user._id, planName: annualPlanName },
     'user is upgrading to annual billing with discount'
   )
diff --git a/services/web/app/src/Features/Subscription/SubscriptionGroupController.js b/services/web/app/src/Features/Subscription/SubscriptionGroupController.js
index 2724727171..32203c3276 100644
--- a/services/web/app/src/Features/Subscription/SubscriptionGroupController.js
+++ b/services/web/app/src/Features/Subscription/SubscriptionGroupController.js
@@ -7,7 +7,7 @@ const SessionManager = require('../Authentication/SessionManager')
 function removeUserFromGroup(req, res, next) {
   const subscription = req.entity
   const userToRemoveId = req.params.user_id
-  logger.log(
+  logger.debug(
     { subscriptionId: subscription._id, userToRemove_id: userToRemoveId },
     'removing user from group subscription'
   )
diff --git a/services/web/app/src/Features/Subscription/SubscriptionLocator.js b/services/web/app/src/Features/Subscription/SubscriptionLocator.js
index b731bde829..a6359aac4d 100644
--- a/services/web/app/src/Features/Subscription/SubscriptionLocator.js
+++ b/services/web/app/src/Features/Subscription/SubscriptionLocator.js
@@ -20,7 +20,7 @@ const SubscriptionLocator = {
   getUsersSubscription(user_or_id, callback) {
     const user_id = SubscriptionLocator._getUserId(user_or_id)
     Subscription.findOne({ admin_id: user_id }, function (err, subscription) {
-      logger.log({ user_id }, 'got users subscription')
+      logger.debug({ user_id }, 'got users subscription')
       callback(err, subscription)
     })
   },
@@ -30,7 +30,7 @@ const SubscriptionLocator = {
     Subscription.findOne(
       { admin_id: user_id, groupPlan: false },
       function (err, subscription) {
-        logger.log({ user_id }, 'got users individual subscription')
+        logger.debug({ user_id }, 'got users individual subscription')
         callback(err, subscription)
       }
     )
diff --git a/services/web/app/src/Features/Subscription/TeamInvitesHandler.js b/services/web/app/src/Features/Subscription/TeamInvitesHandler.js
index e4e8d12f11..828085370c 100644
--- a/services/web/app/src/Features/Subscription/TeamInvitesHandler.js
+++ b/services/web/app/src/Features/Subscription/TeamInvitesHandler.js
@@ -233,7 +233,7 @@ const removeLegacyInvite = (subscriptionId, email, callback) =>
 
 function checkIfInviteIsPossible(subscription, email, callback) {
   if (!subscription.groupPlan) {
-    logger.log(
+    logger.debug(
       { subscriptionId: subscription.id },
       'can not add members to a subscription that is not in a group plan'
     )
@@ -241,7 +241,7 @@ function checkIfInviteIsPossible(subscription, email, callback) {
   }
 
   if (LimitationsManager.teamHasReachedMemberLimit(subscription)) {
-    logger.log(
+    logger.debug(
       { subscriptionId: subscription.id },
       'team has reached member limit'
     )
@@ -261,7 +261,7 @@ function checkIfInviteIsPossible(subscription, email, callback) {
     )
 
     if (existingMember) {
-      logger.log(
+      logger.debug(
         { subscriptionId: subscription.id, email },
         'user already in team'
       )
diff --git a/services/web/app/src/Features/ThirdPartyDataStore/UpdateMerger.js b/services/web/app/src/Features/ThirdPartyDataStore/UpdateMerger.js
index b6053282f9..04f1886872 100644
--- a/services/web/app/src/Features/ThirdPartyDataStore/UpdateMerger.js
+++ b/services/web/app/src/Features/ThirdPartyDataStore/UpdateMerger.js
@@ -212,7 +212,7 @@ module.exports = UpdateMerger = {
             )
             return callback(err)
           }
-          logger.log({ docLines }, 'processing doc update from tpds')
+          logger.debug({ docLines }, 'processing doc update from tpds')
           return EditorController.upsertDocWithPath(
             project_id,
             path,
diff --git a/services/web/app/src/Features/TokenAccess/TokenAccessController.js b/services/web/app/src/Features/TokenAccess/TokenAccessController.js
index 8ecd1ba965..1472e78aaf 100644
--- a/services/web/app/src/Features/TokenAccess/TokenAccessController.js
+++ b/services/web/app/src/Features/TokenAccess/TokenAccessController.js
@@ -147,7 +147,7 @@ async function checkAndGetProjectOrResponseAction(
   if (isAnonymousUser && tokenAccessEnabled) {
     if (tokenType === TokenAccessHandler.TOKEN_TYPES.READ_AND_WRITE) {
       if (TokenAccessHandler.ANONYMOUS_READ_AND_WRITE_ENABLED) {
-        logger.info({ projectId }, 'granting read-write anonymous access')
+        logger.debug({ projectId }, 'granting read-write anonymous access')
         TokenAccessHandler.grantSessionTokenAccess(req, projectId, token)
         return [
           null,
@@ -178,7 +178,7 @@ async function checkAndGetProjectOrResponseAction(
         ]
       }
     } else if (tokenType === TokenAccessHandler.TOKEN_TYPES.READ_ONLY) {
-      logger.info({ projectId }, 'granting read-only anonymous access')
+      logger.debug({ projectId }, 'granting read-only anonymous access')
       TokenAccessHandler.grantSessionTokenAccess(req, projectId, token)
       return [
         null,
diff --git a/services/web/app/src/Features/Uploads/ArchiveManager.js b/services/web/app/src/Features/Uploads/ArchiveManager.js
index 2a8f1aa61a..e8c7e348a0 100644
--- a/services/web/app/src/Features/Uploads/ArchiveManager.js
+++ b/services/web/app/src/Features/Uploads/ArchiveManager.js
@@ -219,7 +219,7 @@ const ArchiveManager = {
       }
 
       const timer = new metrics.Timer('unzipDirectory')
-      logger.log({ source, destination }, 'unzipping file')
+      logger.debug({ source, destination }, 'unzipping file')
 
       return ArchiveManager._extractZipFiles(
         source,
diff --git a/services/web/app/src/Features/Uploads/FileSystemImportManager.js b/services/web/app/src/Features/Uploads/FileSystemImportManager.js
index bf80372375..f4c656a102 100644
--- a/services/web/app/src/Features/Uploads/FileSystemImportManager.js
+++ b/services/web/app/src/Features/Uploads/FileSystemImportManager.js
@@ -86,7 +86,7 @@ async function addFolderContents(
   replace
 ) {
   if (!(await _isSafeOnFileSystem(folderPath))) {
-    logger.log(
+    logger.debug(
       { userId, projectId, parentFolderId, folderPath },
       'add folder contents is from symlink, stopping insert'
     )
@@ -110,7 +110,7 @@ async function addFolderContents(
 
 async function addEntity(userId, projectId, folderId, name, fsPath, replace) {
   if (!(await _isSafeOnFileSystem(fsPath))) {
-    logger.log(
+    logger.debug(
       { userId, projectId, folderId, fsPath },
       'add entry is from symlink, stopping insert'
     )
diff --git a/services/web/app/src/Features/User/UserController.js b/services/web/app/src/Features/User/UserController.js
index be3b8e7431..8495376413 100644
--- a/services/web/app/src/Features/User/UserController.js
+++ b/services/web/app/src/Features/User/UserController.js
@@ -428,7 +428,7 @@ const UserController = {
   doLogout(req, cb) {
     metrics.inc('user.logout')
     const user = SessionManager.getSessionUser(req.session)
-    logger.log({ user }, 'logging out')
+    logger.debug({ user }, 'logging out')
     const sessionId = req.sessionID
     if (typeof req.logout === 'function') {
       req.logout()
diff --git a/services/web/app/src/Features/User/UserDeleter.js b/services/web/app/src/Features/User/UserDeleter.js
index 159c13bdf4..c5465576cf 100644
--- a/services/web/app/src/Features/User/UserDeleter.js
+++ b/services/web/app/src/Features/User/UserDeleter.js
@@ -37,7 +37,7 @@ async function deleteUser(userId, options = {}) {
 
   try {
     const user = await User.findById(userId).exec()
-    logger.log({ user }, 'deleting user')
+    logger.debug({ user }, 'deleting user')
 
     await ensureCanDeleteUser(user)
     await _cleanupUser(user)
diff --git a/services/web/app/src/Features/User/UserPagesController.js b/services/web/app/src/Features/User/UserPagesController.js
index 922eb99cb3..01d4117a72 100644
--- a/services/web/app/src/Features/User/UserPagesController.js
+++ b/services/web/app/src/Features/User/UserPagesController.js
@@ -197,7 +197,7 @@ const UserPagesController = {
 
   sessionsPage(req, res, next) {
     const user = SessionManager.getSessionUser(req.session)
-    logger.log({ userId: user._id }, 'loading sessions page')
+    logger.debug({ userId: user._id }, 'loading sessions page')
     const currentSession = {
       ip_address: user.ip_address,
       session_created: user.session_created,
diff --git a/services/web/app/src/Features/User/UserRegistrationHandler.js b/services/web/app/src/Features/User/UserRegistrationHandler.js
index 7f07a11655..ae49b87131 100644
--- a/services/web/app/src/Features/User/UserRegistrationHandler.js
+++ b/services/web/app/src/Features/User/UserRegistrationHandler.js
@@ -106,7 +106,10 @@ const UserRegistrationHandler = {
         }
 
         if (error && error.message === 'EmailAlreadyRegistered') {
-          logger.log({ email }, 'user already exists, resending welcome email')
+          logger.debug(
+            { email },
+            'user already exists, resending welcome email'
+          )
         }
 
         const ONE_WEEK = 7 * 24 * 60 * 60 // seconds
diff --git a/services/web/app/src/Features/User/UserSessionsManager.js b/services/web/app/src/Features/User/UserSessionsManager.js
index 43f355b8b1..4190a7a3f9 100644
--- a/services/web/app/src/Features/User/UserSessionsManager.js
+++ b/services/web/app/src/Features/User/UserSessionsManager.js
@@ -88,7 +88,10 @@ const UserSessionsManager = {
       }
       sessionKeys = _.filter(sessionKeys, k => !_.contains(exclude, k))
       if (sessionKeys.length === 0) {
-        logger.log({ user_id: user._id }, 'no other sessions found, returning')
+        logger.debug(
+          { user_id: user._id },
+          'no other sessions found, returning'
+        )
         return callback(null, [])
       }
 
@@ -148,13 +151,13 @@ const UserSessionsManager = {
         k => !Array.from(retain).includes(k)
       )
       if (keysToDelete.length === 0) {
-        logger.log(
+        logger.debug(
           { user_id: user._id },
           'no sessions in UserSessions set to delete, returning'
         )
         return callback(null)
       }
-      logger.log(
+      logger.debug(
         { user_id: user._id, count: keysToDelete.length },
         'deleting sessions for user'
       )
diff --git a/services/web/app/src/Features/User/UserUpdater.js b/services/web/app/src/Features/User/UserUpdater.js
index 8ab2dd28a2..383572585c 100644
--- a/services/web/app/src/Features/User/UserUpdater.js
+++ b/services/web/app/src/Features/User/UserUpdater.js
@@ -231,7 +231,7 @@ async function confirmEmail(userId, email) {
   if (email == null) {
     throw new Error('invalid email')
   }
-  logger.log({ userId, email }, 'confirming user email')
+  logger.debug({ userId, email }, 'confirming user email')
 
   try {
     await InstitutionsAPI.promises.addAffiliation(userId, email, {
diff --git a/services/web/app/src/Features/V1/V1Handler.js b/services/web/app/src/Features/V1/V1Handler.js
index a76bfa4220..2fd3481fbf 100644
--- a/services/web/app/src/Features/V1/V1Handler.js
+++ b/services/web/app/src/Features/V1/V1Handler.js
@@ -37,7 +37,7 @@ module.exports = V1Handler = {
         if ([200, 403].includes(response.statusCode)) {
           const isValid = body.valid
           const userProfile = body.user_profile
-          logger.log(
+          logger.debug(
             {
               email,
               isValid,
@@ -78,7 +78,7 @@ module.exports = V1Handler = {
           return callback(err, false)
         }
         if ([200].includes(response.statusCode)) {
-          logger.log(
+          logger.debug(
             { v1_user_id, changed: true },
             'got success response from v1 password reset api'
           )
diff --git a/services/web/app/src/infrastructure/ExpressLocals.js b/services/web/app/src/infrastructure/ExpressLocals.js
index e3fdd2db11..b66f630468 100644
--- a/services/web/app/src/infrastructure/ExpressLocals.js
+++ b/services/web/app/src/infrastructure/ExpressLocals.js
@@ -112,7 +112,7 @@ module.exports = function (webRouter, privateApiRouter, publicApiRouter) {
     const cdnBlocked = req.query.nocdn === 'true' || req.session.cdnBlocked
     const userId = SessionManager.getLoggedInUserId(req.session)
     if (cdnBlocked && req.session.cdnBlocked == null) {
-      logger.log(
+      logger.debug(
         { user_id: userId, ip: req != null ? req.ip : undefined },
         'cdnBlocked for user, not using it and turning it off for future requets'
       )
diff --git a/services/web/app/src/infrastructure/FileWriter.js b/services/web/app/src/infrastructure/FileWriter.js
index 5cdf5ca7f1..20364eb7d0 100644
--- a/services/web/app/src/infrastructure/FileWriter.js
+++ b/services/web/app/src/infrastructure/FileWriter.js
@@ -153,7 +153,7 @@ const FileWriter = {
           return callback(err)
         }
 
-        logger.log(
+        logger.debug(
           { identifier, fsPath },
           '[writeStreamToDisk] write stream finished'
         )
diff --git a/services/web/app/src/infrastructure/GeoIpLookup.js b/services/web/app/src/infrastructure/GeoIpLookup.js
index 07b90308a7..274bb1b239 100644
--- a/services/web/app/src/infrastructure/GeoIpLookup.js
+++ b/services/web/app/src/infrastructure/GeoIpLookup.js
@@ -68,7 +68,7 @@ function getDetails(ip, callback) {
     timeout: 1000,
     json: true,
   }
-  logger.log({ ip, opts }, 'getting geo ip details')
+  logger.debug({ ip, opts }, 'getting geo ip details')
   request.get(opts, function (err, res, ipDetails) {
     if (err) {
       logger.warn({ err, ip }, 'error getting ip details')
@@ -91,7 +91,7 @@ function getCurrencyCode(ip, callback) {
         ? ipDetails.country_code.toUpperCase()
         : undefined
     const currencyCode = currencyMappings[countryCode] || 'USD'
-    logger.log({ ip, currencyCode, ipDetails }, 'got currencyCode for ip')
+    logger.debug({ ip, currencyCode, ipDetails }, 'got currencyCode for ip')
     callback(err, currencyCode, countryCode)
   })
 }
diff --git a/services/web/app/src/infrastructure/LockManager.js b/services/web/app/src/infrastructure/LockManager.js
index 4d58b4be9f..ebccc8ec0e 100644
--- a/services/web/app/src/infrastructure/LockManager.js
+++ b/services/web/app/src/infrastructure/LockManager.js
@@ -15,7 +15,7 @@ let COUNT = 0
 
 const LOCK_QUEUES = new Map() // queue lock requests for each name/id so they get the lock on a first-come first-served basis
 
-logger.log(
+logger.debug(
   { lockManagerSettings: settings.lockManager },
   'LockManager initialising'
 )
@@ -60,7 +60,7 @@ const LockManager = {
       // is designed to log if this happens.
       function countIfExceededLockTimeout() {
         metrics.inc(`lock.${namespace}.exceeded_lock_timeout`)
-        logger.log('exceeded lock timeout', {
+        logger.debug('exceeded lock timeout', {
           namespace,
           id,
           slowExecutionError,
@@ -77,7 +77,7 @@ const LockManager = {
 
           const timeTaken = new Date() - timer.start
           if (timeTaken > LockManager.SLOW_EXECUTION_THRESHOLD) {
-            logger.log('slow execution during lock', {
+            logger.debug('slow execution during lock', {
               namespace,
               id,
               timeTaken,
@@ -113,7 +113,7 @@ const LockManager = {
           callback(err, true, lockValue)
         } else {
           metrics.inc(`lock.${namespace}.try.failed`)
-          logger.log({ key, redis_response: gotLock }, 'lock is locked')
+          logger.debug({ key, redis_response: gotLock }, 'lock is locked')
           callback(err, false)
         }
       }
diff --git a/services/web/app/src/infrastructure/Mongoose.js b/services/web/app/src/infrastructure/Mongoose.js
index b4eee7fa80..9a1f2b430e 100644
--- a/services/web/app/src/infrastructure/Mongoose.js
+++ b/services/web/app/src/infrastructure/Mongoose.js
@@ -27,7 +27,7 @@ const connectionPromise = mongoose.connect(
 )
 
 mongoose.connection.on('connected', () =>
-  logger.log('mongoose default connection open')
+  logger.debug('mongoose default connection open')
 )
 
 mongoose.connection.on('error', err =>
@@ -35,7 +35,7 @@ mongoose.connection.on('error', err =>
 )
 
 mongoose.connection.on('disconnected', () =>
-  logger.log('mongoose default connection disconnected')
+  logger.debug('mongoose default connection disconnected')
 )
 
 if (process.env.MONGOOSE_DEBUG) {
diff --git a/services/web/app/src/infrastructure/ProxyManager.js b/services/web/app/src/infrastructure/ProxyManager.js
index 6cc0ecebed..d9e6138a96 100644
--- a/services/web/app/src/infrastructure/ProxyManager.js
+++ b/services/web/app/src/infrastructure/ProxyManager.js
@@ -41,7 +41,7 @@ module.exports = ProxyManager = {
   createProxy(target) {
     return function (req, res, next) {
       const targetUrl = makeTargetUrl(target, req)
-      logger.log({ targetUrl, reqUrl: req.url }, 'proxying url')
+      logger.debug({ targetUrl, reqUrl: req.url }, 'proxying url')
 
       const options = { url: targetUrl }
       if (req.headers != null ? req.headers.cookie : undefined) {
diff --git a/services/web/app/src/infrastructure/Server.js b/services/web/app/src/infrastructure/Server.js
index 1863284770..fbccb2f39f 100644
--- a/services/web/app/src/infrastructure/Server.js
+++ b/services/web/app/src/infrastructure/Server.js
@@ -277,30 +277,30 @@ webRouter.use(
 
 // add CSP header to HTML-rendering routes, if enabled
 if (Settings.csp && Settings.csp.enabled) {
-  logger.info('adding CSP header to rendered routes', Settings.csp)
+  logger.debug('adding CSP header to rendered routes', Settings.csp)
   app.use(csp(Settings.csp))
 }
 
-logger.info('creating HTTP server'.yellow)
+logger.debug('creating HTTP server'.yellow)
 const server = require('http').createServer(app)
 
 // provide settings for separate web and api processes
 if (Settings.enabledServices.includes('api')) {
-  logger.info('providing api router')
+  logger.debug('providing api router')
   app.use(privateApiRouter)
   app.use(Validation.errorMiddleware)
   app.use(ErrorController.handleApiError)
 }
 
 if (Settings.enabledServices.includes('web')) {
-  logger.info('providing web router')
+  logger.debug('providing web router')
 
   if (Settings.precompilePugTemplatesAtBootTime) {
-    logger.info('precompiling views for web in production environment')
+    logger.debug('precompiling views for web in production environment')
     Views.precompileViews(app)
   }
   if (app.get('env') === 'test') {
-    logger.info('enabling view cache for acceptance tests')
+    logger.debug('enabling view cache for acceptance tests')
     app.enable('view cache')
   }
 
diff --git a/services/web/app/src/infrastructure/Views.js b/services/web/app/src/infrastructure/Views.js
index 1460006eb7..df3725e669 100644
--- a/services/web/app/src/infrastructure/Views.js
+++ b/services/web/app/src/infrastructure/Views.js
@@ -38,14 +38,14 @@ module.exports = {
           cache: true,
           compileDebug: Settings.debugPugTemplates,
         })
-        logger.log({ filename }, 'compiled')
+        logger.debug({ filename }, 'compiled')
         success++
       } catch (err) {
         logger.error({ filename, err: err.message }, 'error compiling')
         failures++
       }
     })
-    logger.log(
+    logger.debug(
       { timeTaken: Date.now() - startTime, failures, success },
       'compiled templates'
     )
diff --git a/services/web/modules/launchpad/app/src/LaunchpadController.js b/services/web/modules/launchpad/app/src/LaunchpadController.js
index 480bb2f87f..f2b327ffcc 100644
--- a/services/web/modules/launchpad/app/src/LaunchpadController.js
+++ b/services/web/modules/launchpad/app/src/LaunchpadController.js
@@ -104,12 +104,12 @@ module.exports = LaunchpadController = {
   sendTestEmail(req, res, next) {
     const { email } = req.body
     if (!email) {
-      logger.log({}, 'no email address supplied')
+      logger.debug({}, 'no email address supplied')
       return res.status(400).json({
         message: 'no email address supplied',
       })
     }
-    logger.log({ email }, 'sending test email')
+    logger.debug({ email }, 'sending test email')
     const emailOptions = { to: email }
     return EmailHandler.sendEmail('testEmail', emailOptions, function (err) {
       if (err != null) {
@@ -118,7 +118,7 @@ module.exports = LaunchpadController = {
         })
         return next(err)
       }
-      logger.log({ email }, 'sent test email')
+      logger.debug({ email }, 'sent test email')
       res.json({ message: res.locals.translate('email_sent') })
     })
   },
@@ -126,7 +126,7 @@ module.exports = LaunchpadController = {
   registerExternalAuthAdmin(authMethod) {
     return function (req, res, next) {
       if (LaunchpadController._getAuthMethod() !== authMethod) {
-        logger.log(
+        logger.debug(
           { authMethod },
           'trying to register external admin, but that auth service is not enabled, disallow'
         )
@@ -134,18 +134,18 @@ module.exports = LaunchpadController = {
       }
       const { email } = req.body
       if (!email) {
-        logger.log({ authMethod }, 'no email supplied, disallow')
+        logger.debug({ authMethod }, 'no email supplied, disallow')
         return res.sendStatus(400)
       }
 
-      logger.log({ email }, 'attempted register first admin user')
+      logger.debug({ email }, 'attempted register first admin user')
       return LaunchpadController._atLeastOneAdminExists(function (err, exists) {
         if (err != null) {
           return next(err)
         }
 
         if (exists) {
-          logger.log(
+          logger.debug(
             { email },
             'already have at least one admin user, disallow'
           )
@@ -158,7 +158,7 @@ module.exports = LaunchpadController = {
           first_name: email,
           last_name: '',
         }
-        logger.log(
+        logger.debug(
           { body, authMethod },
           'creating admin account for specified external-auth user'
         )
@@ -189,7 +189,7 @@ module.exports = LaunchpadController = {
                 }
 
                 AuthenticationController.setRedirectInSession(req, '/launchpad')
-                logger.log(
+                logger.debug(
                   { email, user_id: user._id, authMethod },
                   'created first admin account'
                 )
@@ -207,18 +207,18 @@ module.exports = LaunchpadController = {
     const { email } = req.body
     const { password } = req.body
     if (!email || !password) {
-      logger.log({}, 'must supply both email and password, disallow')
+      logger.debug({}, 'must supply both email and password, disallow')
       return res.sendStatus(400)
     }
 
-    logger.log({ email }, 'attempted register first admin user')
+    logger.debug({ email }, 'attempted register first admin user')
     return LaunchpadController._atLeastOneAdminExists(function (err, exists) {
       if (err != null) {
         return next(err)
       }
 
       if (exists) {
-        logger.log(
+        logger.debug(
           { email: req.body.email },
           'already have at least one admin user, disallow'
         )
@@ -233,7 +233,7 @@ module.exports = LaunchpadController = {
             return next(err)
           }
 
-          logger.log({ user_id: user._id }, 'making user an admin')
+          logger.debug({ user_id: user._id }, 'making user an admin')
           User.updateOne(
             { _id: user._id },
             {
@@ -250,7 +250,7 @@ module.exports = LaunchpadController = {
                 return next(err)
               }
 
-              logger.log(
+              logger.debug(
                 { email, user_id: user._id },
                 'created first admin account'
               )
diff --git a/services/web/modules/launchpad/app/src/LaunchpadRouter.js b/services/web/modules/launchpad/app/src/LaunchpadRouter.js
index 6ac3008d4b..410d399519 100644
--- a/services/web/modules/launchpad/app/src/LaunchpadRouter.js
+++ b/services/web/modules/launchpad/app/src/LaunchpadRouter.js
@@ -16,7 +16,7 @@ const AuthorizationMiddleware = require('../../../../app/src/Features/Authorizat
 
 module.exports = {
   apply(webRouter) {
-    logger.log({}, 'Init launchpad router')
+    logger.debug({}, 'Init launchpad router')
 
     webRouter.get('/launchpad', LaunchpadController.launchpadPage)
     webRouter.post(
diff --git a/services/web/modules/user-activate/app/src/UserActivateRouter.js b/services/web/modules/user-activate/app/src/UserActivateRouter.js
index c6294ed04c..a9088dd544 100644
--- a/services/web/modules/user-activate/app/src/UserActivateRouter.js
+++ b/services/web/modules/user-activate/app/src/UserActivateRouter.js
@@ -5,7 +5,7 @@ const AuthorizationMiddleware = require('../../../../app/src/Features/Authorizat
 
 module.exports = {
   apply(webRouter) {
-    logger.log({}, 'Init UserActivate router')
+    logger.debug({}, 'Init UserActivate router')
 
     webRouter.get(
       '/admin/user',
diff --git a/services/web/test/unit/src/Authentication/AuthenticationControllerTests.js b/services/web/test/unit/src/Authentication/AuthenticationControllerTests.js
index a3c37c4c48..a1a5f08a3c 100644
--- a/services/web/test/unit/src/Authentication/AuthenticationControllerTests.js
+++ b/services/web/test/unit/src/Authentication/AuthenticationControllerTests.js
@@ -471,7 +471,7 @@ describe('AuthenticationController', function () {
       })
 
       it('should log the failed login', function () {
-        this.logger.log
+        this.logger.debug
           .calledWith({ email: this.email.toLowerCase() }, 'failed log in')
           .should.equal(true)
       })
@@ -911,7 +911,7 @@ describe('AuthenticationController', function () {
     })
 
     it('should log out a message', function () {
-      this.logger.log
+      this.logger.debug
         .calledWith(
           { url: this.url },
           'user not logged in so redirecting to register page'
@@ -1417,7 +1417,7 @@ describe('AuthenticationController', function () {
       })
 
       it('should log the successful login', function () {
-        this.logger.log
+        this.logger.debug
           .calledWith(
             { email: this.user.email, user_id: this.user._id.toString() },
             'successful log in'