diff --git a/src/zmb-ad-join/install-service.sh b/src/zmb-ad-join/install-service.sh
index 60173bf..9fdfa1f 100644
--- a/src/zmb-ad-join/install-service.sh
+++ b/src/zmb-ad-join/install-service.sh
@@ -205,7 +205,7 @@ EOF
 chmod +x /usr/local/bin/smb-backup
 
 cat << EOF > /etc/cron.d/smb-backup
-23 * * * * root /usr/local/bin/smb-backup 7 >> /var/log/smb-backup.log 2>&1
+0 23 * * * root /usr/local/bin/smb-backup 7 >> /var/log/smb-backup.log 2>&1
 EOF
 
 cat << EOF > /etc/logrotate.d/smb-backup
diff --git a/src/zmb-ad/install-service.sh b/src/zmb-ad/install-service.sh
index 583d41b..fbc3340 100644
--- a/src/zmb-ad/install-service.sh
+++ b/src/zmb-ad/install-service.sh
@@ -176,7 +176,7 @@ EOF
 chmod +x /usr/local/bin/smb-backup
 
 cat << EOF > /etc/cron.d/smb-backup
-23 * * * * root /usr/local/bin/smb-backup 7 >> /var/log/smb-backup.log 2>&1
+0 23 * * * root /usr/local/bin/smb-backup 7 >> /var/log/smb-backup.log 2>&1
 EOF
 
 cat << EOF > /etc/logrotate.d/smb-backup