diff --git a/www/gplot/hm-rt.gplot b/www/gplot/hm-rt.gplot
index 98d8ffe09..b07a1d076 100644
--- a/www/gplot/hm-rt.gplot
+++ b/www/gplot/hm-rt.gplot
@@ -10,6 +10,7 @@ set timefmt "%Y-%m-%d_%H:%M:%S"
 set xlabel " "
 set ytics nomirror
 set y2tics
+set yrange 0:100
 set title '<L1>'
 set grid xtics y2tics