diff --git a/roles/knot/tasks/main.yaml b/roles/knot/tasks/main.yaml
index 5a0cbbc..ce18634 100644
--- a/roles/knot/tasks/main.yaml
+++ b/roles/knot/tasks/main.yaml
@@ -29,6 +29,7 @@
     owner: "root"
     group: "knot"
     validate: "knotc -c %s conf-check"
+    backup: true
   notify: Restart knot
 
 - name: Enable and start knot