diff --git a/defaults/main.yml b/defaults/main.yml
index 3b73190..b73927b 100755
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -30,6 +30,6 @@ bb_repo_name: "{{ inventory_hostname }}"
 bb_sshkey: "{{ root_user['ssh_public_key'] }}"
 borgmatic_cron_hour: "{{ 6 | random }}"
 borgmatic_cron_minute: "{{ 59 | random }}"
-borgmatic_cron_checks_day: "{{ 28 | random }}"
+borgmatic_cron_checks_day: "{{ range(1, 28) | random }}"
 borgmatic_cron_checks_hour: "{{ range(7, 24) | random }}"
 borgmatic_cron_checks_minute: "{{ 59 | random }}"