diff --git a/compose.yml b/compose.yml
index 80907ca..245cb63 100644
--- a/compose.yml
+++ b/compose.yml
@@ -78,6 +78,9 @@ services:
         target: /pg_backup.sh
         mode: 0555
     entrypoint: /usr/local/bin/cc-db-entrypoint.sh
+    # overriding entrypoint drops the image's default CMD, so restore it; the
+    # wrapper passes "$@" through and pgautoupgrade keys its logic on $1=postgres
+    command: postgres
     environment:
       - POSTGRES_HOST_AUTH_METHOD=trust
       - POSTGRES_USER=discourse