diff --git a/docker-compose.yml b/docker-compose.yml
index b98776d1f..e657390a7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,7 +12,7 @@
 #
 # ⚠️  IMPORTANT: Change all default passwords before deploying to production!
 
-version: '3.4'
+version: '3.4' # For compatibility with older Docker versions
 
 services:
   new-api: