diff --git a/css/diff2html.css b/css/diff2html.css
index ed4f224..1529e3f 100644
--- a/css/diff2html.css
+++ b/css/diff2html.css
@@ -75,6 +75,7 @@
 
 .d2h-file-diff {
     overflow-x: scroll;
+    overflow-y: hidden;
 }
 
 .d2h-file-side-diff {