diff --git a/plot.sh b/plot.sh
index d8619de..cf140a5 100644
--- a/plot.sh
+++ b/plot.sh
@@ -2,10 +2,11 @@ DATAPATH=/var/lib/munin/localdomain
 OUTPATH=~/public_html
 
 rrdtool graph $OUTPATH/river-canterbury.png \
-  --end now --start end-3w \
+  --end now --start end-4w \
   --height 400 --width 1200 \
   DEF:r17_1135=$DATAPATH/localhost.localdomain-river_levels_17-river_level_1135-g.rrd:42:AVERAGE \
   DEF:r17_1143=$DATAPATH/localhost.localdomain-river_levels_17-river_level_1143-g.rrd:42:AVERAGE \
   LINE1:r17_1135#0000FF:"Stour at Chartham (1135)\l" \
   LINE1:r17_1143#00FF00:"Stour at Vauxhall Bridge (1143)\l" \
-  HRULE:0.8#000000
+  HRULE:0.8#000000 \
+  >/dev/null