diff --git a/dockerfiles/staging/docker-compose.yml b/dockerfiles/staging/docker-compose.yml
index 5d2b69d0a..cb3547802 100644
--- a/dockerfiles/staging/docker-compose.yml
+++ b/dockerfiles/staging/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '3.3'
 services:
   coordinator:
     image: "${IMAGE_PREFIX:-docker.io/labgrid/}coordinator"