diff --git a/scraps/bootstrap.yml b/scraps/bootstrap.yml
index 01f416e..947e173 100644
--- a/scraps/bootstrap.yml
+++ b/scraps/bootstrap.yml
@@ -101,5 +101,6 @@
       owner: hpf-ans
       group: hpf-ans
       mode: u=rwx,go=
+      backup: true
     become: no