diff --git a/roles/ldap_server/tasks/backup.yml b/roles/ldap_server/tasks/backup.yml
index 794ada3e06d31db3e59b38e3ea85da94429e4b23..14aff20fee7c1baada76ab88b316ff630aa114c3 100644
--- a/roles/ldap_server/tasks/backup.yml
+++ b/roles/ldap_server/tasks/backup.yml
@@ -6,7 +6,7 @@
     state: directory
     owner: root
     group: root
-    mode: 0700
+    mode: "0700"
   with_items:
     - "/srv/backup"
 
@@ -16,4 +16,4 @@
     dest: "/etc/duply/main/pre.d/ldapdump.sh"
     owner: root
     group: root
-    mode: 0700
+    mode: "0700"