diff --git a/layouts/partials/head_includes.html b/layouts/partials/head_includes.html
index b7fbbe1..7391e36 100644
--- a/layouts/partials/head_includes.html
+++ b/layouts/partials/head_includes.html
@@ -11,7 +11,7 @@
 <!-- CSS -->
 
 {{ if .Site.Params.highlightjs }}
-  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.8.0/styles/default.min.css">
+  <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.9.0/styles/default.min.css">
 {{ end }}
 
 <link rel="stylesheet" href="{{ .Site.BaseURL }}css/reset.css">