diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 60c50d2b2..b3dbfd7f2 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -697,6 +697,7 @@ div.wiki pre {
     border: 1px solid #dadada;
     width:auto;
     overflow-x: auto;
+    overflow-y: hidden;
 }
 
 div.wiki ul.toc {