diff --git a/docs/index.html b/docs/index.html
index 67d8f59..b21700d 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -24,7 +24,7 @@
 <main id="main-content">
 
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.45.0/codemirror.min.css">
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.18.0/clusterize.min.css">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.19.0/clusterize.min.css">
 
 <h1><a href="https://github.com/sh-cho/tree-sitter-fluentbit">Tree-sitter fluent-bit</a> <span id="version">v0.1.0-alpha.2</span></h1>
 
@@ -66,7 +66,7 @@ <h4>Tree</h4>
 <script>LANGUAGE_BASE_URL = "assets/tree-sitter-fluentbit-0.1.0-alpha.2";</script>
 <script src="assets/web-tree-sitter-0.20.8/tree-sitter.js"></script>
 
-<script src="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.18.0/clusterize.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.19.0/clusterize.min.js"></script>
 <script src="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous"></script>
 <script src="assets/tree-sitter-playground-0.20.8/playground.js"></script>
 <script>