diff --git a/templates/systemd/chill-send-sms@.timer b/templates/systemd/chill-send-sms@.timer
index 54547d7..ba9c673 100644
--- a/templates/systemd/chill-send-sms@.timer
+++ b/templates/systemd/chill-send-sms@.timer
@@ -1,10 +1,11 @@
 [Unit]
-Description=Run chill send-sms
+Description=Run chill send-sms hourly 7:00–18:00 at minute 0
 
 [Timer]
 Unit=chill-send-sms@%i.service
-OnCalendar=*-*-* 7-18:0:00
+OnCalendar=*-*-* 7..18:00:00
+Persistent=true
 RandomizedDelaySec=60
 
 [Install]
-WantedBy=multi-user.target
\ No newline at end of file
+WantedBy=timers.target
\ No newline at end of file