diff --git a/tasks/install.yml b/tasks/install.yml
index 42299b4..b1b2529 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -33,8 +33,8 @@
     - name: Schedule certbot run
       cron:
         name: certbot - letsencrypt certs renewal
-        minute: 55
-        hour: 3
+        minute: "55"
+        hour: "3"
         user: "{{ certbot_user }}"
         job: >
           certbot