diff --git a/powerdns-admin/docker-compose-traefik.yml b/powerdns-admin/docker-compose-traefik.yml
index 8256a60..153ccf9 100644
--- a/powerdns-admin/docker-compose-traefik.yml
+++ b/powerdns-admin/docker-compose-traefik.yml
@@ -16,7 +16,7 @@ services:
       - "traefik.enable=true"
 
       # Router
-      - "traefik.http.routers.powerdns-admin.rule=Host(`{PDNS_ADMIN_HOSTNAME}`)"
+      - "traefik.http.routers.powerdns-admin.rule=Host(`${PDNS_ADMIN_HOSTNAME}`)"
       - "traefik.http.routers.powerdns-admin.entrypoints=websecure"
       - "traefik.http.routers.powerdns-admin.tls=true"
       - "traefik.http.routers.powerdns-admin.tls.certresolver=le"