diff --git a/roles/database_server/tasks/main.yml b/roles/database_server/tasks/main.yml
index c43a467af2d8a4b7d4c47b5e31a3e366235bc278..d8d2d090760c255608a2012d4d35ec682ce17d98 100644
--- a/roles/database_server/tasks/main.yml
+++ b/roles/database_server/tasks/main.yml
@@ -20,7 +20,7 @@
     dest: "/etc/mysql/mariadb.conf.d/90-utf8.cnf"
     owner: root
     group: root
-    mode: 0644
+    mode: "0644"
   register: mariadb_utf8_configuration
 
 - name: Restart MariaDB in order to use UTF-8 as default character set  # noqa no-handler