diff --git a/docs/index.html b/docs/index.html
index 95a8656..52681b0 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -2,7 +2,7 @@
 <head>
     <title>Constraint Engine API</title>
     <meta charset="UTF-8">
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/3.0.1/github-markdown.min.css">
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.9.0/github-markdown.min.css">
     <link rel="stylesheet" href="https://www.app-state-diagram.com/app-state-diagram/assets/css/main.css">
 <style>
     .center-text {
