diff --git a/docker-compose.yml b/docker-compose.yml
index 53e4257f..4eb0e08c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,18 +3,18 @@ version: '3.8'
 services:
   tumsexy:
     image: ghcr.io/tum-dev/tum.sexy/sexy-server:latest
-    
+
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.tumsexy.entrypoints=web"
-      - "traefik.http.routers.tumsexy.rule=Host(`tum.sexy`) || HostRegexp(`tum.sexy`, `{subdomain:[a-z0-9\-]+}.tum.sexy`)"
+      - "traefik.http.routers.tumsexy.rule=Host(`tum.sexy`) || HostRegexp(`tum.sexy`, `{subdomain:[a-z0-9\\-]+}.tum.sexy`)"
       - "traefik.http.routers.tumsexy.middlewares=webs-redirectscheme"
 
       - "traefik.http.routers.tumsexy-secure.entrypoints=webs"
       - "traefik.http.routers.tumsexy-secure.tls.certresolver=sexyresolver"
-      - "traefik.http.routers.tumsexy-secure.rule=Host(`tum.sexy`) || HostRegexp(`tum.sexy`, `{subdomain:[a-z0-9\-]+}.tum.sexy`)"
+      - "traefik.http.routers.tumsexy-secure.rule=Host(`tum.sexy`) || HostRegexp(`tum.sexy`, `{subdomain:[a-z0-9\\-]+}.tum.sexy`)"
       - "traefik.http.services.tumsexy-secure.loadbalancer.server.port=80"
-        
-networks: 
+
+networks:
   traefik_traefik:
     external: true