diff --git a/assets/css/_common/scaffolding/highlight/copy-code.scss b/assets/css/_common/scaffolding/highlight/copy-code.scss
index cdc2f93..d30c876 100644
--- a/assets/css/_common/scaffolding/highlight/copy-code.scss
+++ b/assets/css/_common/scaffolding/highlight/copy-code.scss
@@ -11,6 +11,7 @@
 
   pre {
     position: relative;
+    overflow-x: auto;
   }
 
   table tbody tr {