diff --git a/tests/krb5/docker-compose.yml b/tests/krb5/docker-compose.yml
index 2e91af5..2983599 100644
--- a/tests/krb5/docker-compose.yml
+++ b/tests/krb5/docker-compose.yml
@@ -1,5 +1,3 @@
-version: '2'
-
 services:
     krb5_kiwitcms_org:
         container_name: krb5_kiwitcms_org