diff --git a/assets/css/_common/scaffolding/highlight/copy-code.scss b/assets/css/_common/scaffolding/highlight/copy-code.scss
index 43e794a..e0b14f5 100644
--- a/assets/css/_common/scaffolding/highlight/copy-code.scss
+++ b/assets/css/_common/scaffolding/highlight/copy-code.scss
@@ -14,6 +14,9 @@
 
   pre > code span {
     white-space: break-spaces;
+    overflow: hidden;
+    word-break: break-all;
+    word-wrap: break-word;
   }
 }