diff --git a/docker-compose.override-local.yml b/docker-compose.override-local.yml
index 26a0ebf..14baddf 100644
--- a/docker-compose.override-local.yml
+++ b/docker-compose.override-local.yml
@@ -1,4 +1,4 @@
-version: '2'
+version: '3'
 
 services:
 
diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index c685a51..f7888bb 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -1,4 +1,4 @@
-version: '2'
+version: '3'
 services:
 
   zammad-nginx: