diff --git a/scripts/build-html.sh b/scripts/build-html.sh
index 3e6aa17..523912e 100755
--- a/scripts/build-html.sh
+++ b/scripts/build-html.sh
@@ -2,7 +2,7 @@ mkdir -p public/img
 cp gitlab-page/style.css public/style.css
 
 md() {
-	pandoc -s --css style.css `ls --sort=version $1`
+	pandoc -s --css style.css `ls -v $1`
 }
 
 md "311/lec/*.md" 	> public/intro-to-networking-311.html