diff --git a/README.md b/README.md
index 0571d4a..2f30860 100644
--- a/README.md
+++ b/README.md
@@ -240,13 +240,13 @@ If your favourite language is not included in the default package also add its j
 
 ```html
 <!-- Stylesheet -->
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/github.min.css">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css">
 <link rel="stylesheet" type="text/css" href="dist/diff2html.css">
 
 <!-- Javascripts -->
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.3/jquery.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/languages/scala.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/languages/scala.min.js"></script>
 <script type="text/javascript" src="dist/diff2html-ui.js"></script>
 ```
 
diff --git a/docs/demo.html b/docs/demo.html
index 19434c6..938d8ea 100644
--- a/docs/demo.html
+++ b/docs/demo.html
@@ -33,7 +33,7 @@
     <!-- Custom styles for this template -->
     <link href="main.min.css" rel="stylesheet">
 
-    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/github.min.css">
+    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css">
 
     <!-- diff2html -->
     <link rel="stylesheet" type="text/css" href="assets/diff2html.min.css">
@@ -240,8 +240,8 @@
 }
 </script>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/languages/scala.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/languages/scala.min.js"></script>
 
 <!-- diff2html -->
 <script type="text/javascript" src="assets/diff2html.min.js"></script>
diff --git a/website/templates/pages/demo/demo-assets.partial.mustache b/website/templates/pages/demo/demo-assets.partial.mustache
index 01c1d81..6cac934 100644
--- a/website/templates/pages/demo/demo-assets.partial.mustache
+++ b/website/templates/pages/demo/demo-assets.partial.mustache
@@ -1,4 +1,4 @@
-    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/github.min.css">
+    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css">
 
     <!-- diff2html -->
     <link rel="stylesheet" type="text/css" href="assets/diff2html.min.css">
diff --git a/website/templates/pages/demo/demo-scripts.partial.mustache b/website/templates/pages/demo/demo-scripts.partial.mustache
index f6d9cbb..b1cd313 100644
--- a/website/templates/pages/demo/demo-scripts.partial.mustache
+++ b/website/templates/pages/demo/demo-scripts.partial.mustache
@@ -1,5 +1,5 @@
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/languages/scala.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/languages/scala.min.js"></script>
 
 <!-- diff2html -->
 <script type="text/javascript" src="assets/diff2html.min.js"></script>