diff --git a/docker-compose.yml b/docker-compose.yml
index c53ff18..db2fe5b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -33,5 +33,6 @@ services:
   #    - WATCHTOWER_LABEL_ENABLE=true
   #    - WATCHTOWER_POLL_INTERVAL=3600
   #    - WATCHTOWER_LIFECYCLE_HOOKS=true
+  #    - WATCHTOWER_SCOPE=factorio
   #  labels:
   #    - com.centurylinklabs.watchtower.scope=factorio