diff --git a/bench/perf_monitoring/gemm/make_plot.sh b/bench/perf_monitoring/gemm/make_plot.sh
index 11f3c53bef..3318c43419 100755
--- a/bench/perf_monitoring/gemm/make_plot.sh
+++ b/bench/perf_monitoring/gemm/make_plot.sh
@@ -33,7 +33,7 @@ echo " " >>  $WHAT.gnuplot
 gnuplot -persist < $WHAT.gnuplot
 
 # generate a png file
-# convert -background white -density 120 -rotate 90 -resize 800 +dither -colors 256 -quality 0 $WHAT.ps -background white -flatten  .$WHAT.png
+convert -background white -density 1000 -resize 1000  -colors 256 -quality 0 $WHAT.pdf -background white -flatten $WHAT.png
 
 # clean
 rm $WHAT.out.header $WHAT.gnuplot