diff --git a/docker-compose.yml b/docker-compose.yml
index 14ab9aa..5620b45 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3"
+version: "2.1"
 
 services:
   frontend:
@@ -10,9 +10,9 @@ services:
     expose:
       - "80"
     labels:
-      - "traefik.backend=$CI_PROJECT_NAME-$CI_COMMIT_REF_NAME"
+      - "traefik.backend=${CI_PROJECT_NAME}.${CI_COMMIT_REF_NAME}"
       - "traefik.docker.network=web"
-      - "traefik.frontend.rule=Host:$CI_PROJECT_NAME-$CI_COMMIT_REF_NAME.dev.basehosts.de"
+      - "traefik.frontend.rule=Host:${CI_COMMIT_REF_NAME}.${CI_PROJECT_NAME}.dev.basehosts.de"
       - "traefik.enable=true"
       - "traefik.port=80"