diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index 6568608f1..e05b64ecb 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   php:
     image: wodby/wordpress:$WORDPRESS_TAG
diff --git a/docker-compose.yml b/docker-compose.yml
index 8b5e5a69b..b757b408b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mariadb:
     image: wodby/mariadb:$MARIADB_TAG
diff --git a/tests/docker-compose.yml b/tests/docker-compose.yml
index 2aad1bdad..4c6305aec 100644
--- a/tests/docker-compose.yml
+++ b/tests/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mariadb:
     image: wodby/mariadb:$MARIADB_TAG
diff --git a/traefik.yml b/traefik.yml
index 7661d88e1..efd33eceb 100644
--- a/traefik.yml
+++ b/traefik.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   traefik:
     image: traefik:v2.0