diff --git a/compose.yml b/compose.yml
index df8c3d6..f6911ae 100644
--- a/compose.yml
+++ b/compose.yml
@@ -26,7 +26,7 @@ services:
         - "traefik.docker.network=proxy"
         - "traefik.http.routers.${STACK_NAME}.tls=true"
         - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=80"
-        - "traefik.http.routers.${STACK_NAME}.rule=(Host(`ch.${DOMAIN}`, `${DOMAIN}`)"
+        - "traefik.http.routers.${STACK_NAME}.rule=Host(`ch.${DOMAIN}`, `${DOMAIN}`)"
         # 3wc: this rule works for routing, but not for generating certificates
         # see https://git.autonomic.zone/compose-stacks/planning/issues/14
         #- "traefik.http.routers.${STACK_NAME}.rule=HostRegexp(`{subdomain:.+}.${DOMAIN}`, `${DOMAIN}`)"