diff --git a/netatalk/docker-compose.yml b/netatalk/docker-compose.yml
index 29a3200..df1dca7 100644
--- a/netatalk/docker-compose.yml
+++ b/netatalk/docker-compose.yml
@@ -2,7 +2,8 @@ services:
   netatalk:
     image: netatalk/netatalk:latest
     network_mode: "host"
-    ports: "548:548"
+    ports: 
+      - 548:548
     cap_add:
       - NET_ADMIN    
     security_opt: