diff --git a/sitestatic/archweb.css b/sitestatic/archweb.css
index b7d6e1e..53fa627 100644
--- a/sitestatic/archweb.css
+++ b/sitestatic/archweb.css
@@ -79,6 +79,7 @@ pre {
     pre code {
         display: block;
         background: none;
+        overflow: auto;
     }
 
 blockquote {