diff --git a/roles/bootstrap/tasks/main.yml b/roles/bootstrap/tasks/main.yml
index 3a8e93f772f2b6e524a8c20c3310f923f5e67be3..1a412c52d1b7a5518767caa846dfbc85a92a68df 100644
--- a/roles/bootstrap/tasks/main.yml
+++ b/roles/bootstrap/tasks/main.yml
@@ -26,7 +26,7 @@
   copy:
     src: "ansible_sudo"
     dest: "/etc/sudoers.d/ansible"
-    mode: 0640
+    mode: "0640"
     owner: root
     group: root