diff --git a/compose.yml b/compose.yml
index 7e012dd..e60dc67 100644
--- a/compose.yml
+++ b/compose.yml
@@ -83,6 +83,8 @@ services:
     networks:
       - proxy
       - internal
+    volumes:
+      - "mailman-web:/opt/mailman-web-data"
     deploy:
       update_config:
         failure_action: rollback