diff --git a/lib/app.ts b/lib/app.ts
index aeded1288..0eb2c999d 100644
--- a/lib/app.ts
+++ b/lib/app.ts
@@ -56,7 +56,11 @@ if (config.useSSL) {
 
 // logger
 app.use(morgan('combined', {
-  'stream': logger.stream
+  stream: {
+    write: function (message): void {
+      logger.info(message)
+    }
+  }
 }))
 
 // socket io
diff --git a/lib/logger.js b/lib/logger.ts
similarity index 67%
rename from lib/logger.js
rename to lib/logger.ts
index 6d4bf69af..ee084df23 100644
--- a/lib/logger.js
+++ b/lib/logger.ts
@@ -1,5 +1,5 @@
 'use strict'
-const { createLogger, format, transports } = require('winston')
+import { createLogger, format, transports } from 'winston'
 
 const logger = createLogger({
   level: 'debug',
@@ -18,10 +18,4 @@ const logger = createLogger({
   exitOnError: false
 })
 
-logger.stream = {
-  write: function (message, encoding) {
-    logger.info(message)
-  }
-}
-
-module.exports = logger
+export { logger }