diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index a6d45e5677..3c98fa5e01 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -1,5 +1,3 @@
-version: "3.7"
-
 services:
   php:
     image: wodby/drupal:$DRUPAL_TAG
diff --git a/docker-compose.yml b/docker-compose.yml
index 90eb2e2b7e..ad4b82bad6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3.7"
-
 services:
   mariadb:
     image: wodby/mariadb:$MARIADB_TAG
diff --git a/tests/10/docker-compose.yml b/tests/10/docker-compose.yml
index 23d08892c3..3f11d56a66 100644
--- a/tests/10/docker-compose.yml
+++ b/tests/10/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mariadb:
     image: wodby/mariadb:$MARIADB_TAG
diff --git a/tests/7/docker-compose.yml b/tests/7/docker-compose.yml
index 43606af440..53c2f35e81 100644
--- a/tests/7/docker-compose.yml
+++ b/tests/7/docker-compose.yml
@@ -1,5 +1,3 @@
-version: "3"
-
 services:
   mariadb:
     image: wodby/mariadb:$MARIADB_TAG
diff --git a/tests/9/docker-compose.yml b/tests/9/docker-compose.yml
index 90742ec584..d0f737c4d4 100644
--- a/tests/9/docker-compose.yml
+++ b/tests/9/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 849a3fd3b4..6c563cc5d3 100644
--- a/traefik.yml
+++ b/traefik.yml
@@ -1,5 +1,3 @@
-version: '3'
-
 services:
   traefik:
     image: traefik:v2.0