diff --git a/templates/zammad/3/docker-compose.yml b/templates/zammad/3/docker-compose.yml
index d83c9a7..30cde72 100644
--- a/templates/zammad/3/docker-compose.yml
+++ b/templates/zammad/3/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '3.3'
+version: '2'
 
 services: