diff --git a/index.html b/index.html
index e9e5943..6466328 100644
--- a/index.html
+++ b/index.html
@@ -43,6 +43,9 @@
   <script src="//unpkg.com/docsify/lib/docsify.min.js"></script>
   <script src="//unpkg.com/prismjs/components/prism-go.min.js"></script>
   <script src="//unpkg.com/prismjs/components/prism-java.min.js"></script>
+  <script src="//unpkg.com/prismjs/components/prism-css.min.js"></script>
+  <script src="//unpkg.com/prismjs/components/prism-ruby.min.js"></script>
+  <script src="//unpkg.com/prismjs/components/prism-javascript.min.js"></script>
   <script src="//unpkg.com/docsify/lib/plugins/ga.min.js"></script>
 </body>