diff --git a/source/lib/prism/css/prism-light.css b/source/lib/prism/css/prism-light.css
index c6a1bf5..d92beab 100644
--- a/source/lib/prism/css/prism-light.css
+++ b/source/lib/prism/css/prism-light.css
@@ -43,7 +43,7 @@ code[class*="language-"]::selection, code[class*="language-"] ::selection {
 pre[class*="language-"] {
     padding: -2em;
     margin: .5em 0;
-    overflow: visible;
+    overflow: auto;
     border-radius: 2px;
 }