diff --git a/plot/tasktime b/plot/tasktime
index 8411e3e..1e687e1 100644
--- a/plot/tasktime
+++ b/plot/tasktime
@@ -1,4 +1,5 @@
-set terminal png size 1024,768
+set terminal pngcairo size 1024,768
+set termopt dashed
 set key above horizontal autotitle columnheader
 set bars 5.0
 set style fill solid border -1
@@ -9,5 +10,5 @@ set xrange [*:1]
 set xtics rotate by -45
 plot "tasktime.dat" using 1:3:6:7:4:xtic(2) title 'Man Time Interval' \
     with candlesticks whiskerbars 0.5 lc rgb "#ee5555", \
-     "tasktime.dat" using 1:8 title 'Overlap Mean' with lines lc rgb "green", \
-     "tasktime.dat" using 1:5 title 'Man-Hour Mean' with lines lc rgb "black"
+     "tasktime.dat" using 1:8 title 'Overlap Mean' with lines lt 2, \
+     "tasktime.dat" using 1:5 title 'Man-Hour Mean' with lines lc rgb "black" lt 1