diff --git a/docker/tinode/Dockerfile b/docker/tinode/Dockerfile
index 4ec79f9e3..3a9292e86 100644
--- a/docker/tinode/Dockerfile
+++ b/docker/tinode/Dockerfile
@@ -27,6 +27,9 @@ ENV TARGET_DB=$TARGET_DB
 # An option to reset database.
 ENV RESET_DB=false
 
+# The MYSQL DSN connection.
+ENV MYSQL_DSN='root@tcp(mysql)/tinode'
+
 # Disable chatbot plugin by default.
 ENV PLUGIN_PYTHON_CHAT_BOT_ENABLED=false
 
diff --git a/docker/tinode/config.template b/docker/tinode/config.template
index d37badf48..e8dbc11aa 100644
--- a/docker/tinode/config.template
+++ b/docker/tinode/config.template
@@ -32,7 +32,7 @@
 		"adapters": {
 			"mysql": {
 				"database": "tinode",
-				"dsn": "root@tcp(mysql)/tinode?parseTime=true"
+				"dsn": "$MYSQL_DSN?parseTime=true"
 			},
 			"rethinkdb": {
 				"database": "tinode",