diff --git a/services/chat/app/js/mongodb.js b/services/chat/app/js/mongodb.js
index 11458226e1..ff788f8f96 100644
--- a/services/chat/app/js/mongodb.js
+++ b/services/chat/app/js/mongodb.js
@@ -1,7 +1,10 @@
 const Settings = require('settings-sharelatex')
 const { MongoClient, ObjectId } = require('mongodb')
 
-const clientPromise = MongoClient.connect(Settings.mongo.url)
+const clientPromise = MongoClient.connect(
+  Settings.mongo.url,
+  Settings.mongo.options
+)
 
 let setupDbPromise
 async function waitForDb() {
diff --git a/services/chat/config/settings.defaults.js b/services/chat/config/settings.defaults.js
index 42f24ef5cc..8784445adf 100644
--- a/services/chat/config/settings.defaults.js
+++ b/services/chat/config/settings.defaults.js
@@ -17,6 +17,10 @@ module.exports = {
   },
 
   mongo: {
+    options: {
+      useUnifiedTopology:
+        (process.env.MONGO_USE_UNIFIED_TOPOLOGY || 'true') === 'true'
+    },
     url:
       process.env.MONGO_CONNECTION_STRING ||
       `mongodb://${process.env.MONGO_HOST || 'localhost'}/sharelatex`