diff --git a/Makefile b/Makefile
index 002ec3c..fc433ab 100755
--- a/Makefile
+++ b/Makefile
@@ -9,4 +9,4 @@ pdf:
 
 d20:
 	echo "" > out/statsD20.csv
-	lua tooling/mathD20.lua > out/statsD20.csv && open out/statsD20.csv
+	lua tooling/mathD20.lua > out/statsD20.csv && column -s\; -t < out/statsD20.csv