diff --git a/static/css/style.less b/static/css/style.less
index 4b9d24d..bc2f5e8 100644
--- a/static/css/style.less
+++ b/static/css/style.less
@@ -116,6 +116,7 @@
         font-family: @mono;
         background: @light-grey;
         line-height: 1.125em;
+        overflow-x: auto;
       }
 
       blockquote {