diff --git a/tasks/install.yml b/tasks/install.yml
index b3827a33f5fa59045ac7ac4edf1f1387de70a491..c977f2ebe22ced7159e284d42e768dd8234882cd 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -61,6 +61,6 @@
       dest: /etc/wkhtmltox-version
       owner: root
       group: root
-      mode: 644
+      mode: 0644
 
   when: wkhtmltopdf_version_tag not in wkhtmltox_current_version.stdout