diff --git a/swarm-stack.yml b/swarm-stack.yml
index 8f3c076..97a52f1 100644
--- a/swarm-stack.yml
+++ b/swarm-stack.yml
@@ -16,6 +16,8 @@ services:
       - mariadbdata:/var/lib/mysql
   files:
     image: nginx:1.17-alpine
+    labels:
+      restic-compose-backup.volumes: "true"
     volumes:
       - files:/srv/files