diff --git a/debian/weatherstation-chart.cron.d b/debian/weatherstation-chart.cron.d
index 67ad50c..2758081 100644
--- a/debian/weatherstation-chart.cron.d
+++ b/debian/weatherstation-chart.cron.d
@@ -1,4 +1,4 @@
 #
 # Regular cron jobs for the weatherstation package
 #
-*/15 * 	* * * 	weatherstation	/usr/bin/weather_chart
+0,15,30,45 * 	* * * 	weatherstation	/usr/bin/weather_chart