diff --git a/pelican/themes/notmyidea/static/css/main.css b/pelican/themes/notmyidea/static/css/main.css
index 4324c97c..d351f4d8 100644
--- a/pelican/themes/notmyidea/static/css/main.css
+++ b/pelican/themes/notmyidea/static/css/main.css
@@ -115,6 +115,7 @@ pre {
   color: #DBDBD8;
   margin-bottom: 1em;
   font-family: monospace, Arial, "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
+  overflow-x: auto;
 }
 
 /* Quotes */