diff --git a/debian/weatherstation-chart.postinst b/debian/weatherstation-chart.postinst
index bb56467..d271efa 100644
--- a/debian/weatherstation-chart.postinst
+++ b/debian/weatherstation-chart.postinst
@@ -28,5 +28,5 @@ fi
 /bin/chown weatherstation:weatherstation  /etc/weatherstation/chart.conf
 /bin/chmod 440 /etc/weatherstation/chart.conf
 
-/bin/chown weatherstation:weatherstation $LINKTARGET
-/bin/chmod 644 $LINKTARGET
+/bin/chown weatherstation:www-data $LINKTARGET
+/bin/chmod 750 $LINKTARGET