diff --git a/tasks/install.yml b/tasks/install.yml
index 5072e0d7542094d5acf0f7b5f8d871904010b0b2..c95c6ee5af741ff47154233d41bf0dbf27656514 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -10,7 +10,7 @@
   apt_repository:
     repo: deb https://dl.packager.io/srv/deb/zammad/zammad/stable/ubuntu {{ ansible_distribution_major_version }}.04 main
     state: present
-    mode: 644
+    mode: 0644
 
 - name: Install zammad
   apt: