diff --git a/webworker/index.html b/webworker/index.html
index 02e12a89..e6f2ec36 100644
--- a/webworker/index.html
+++ b/webworker/index.html
@@ -4,12 +4,12 @@
     <meta charset="utf-8"/>
     <title>markdownlint-cli2 webworker tests</title>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
-    <link rel="stylesheet" href="https://code.jquery.com/qunit/qunit-2.19.1.css" crossorigin="anonymous" integrity="sha256-WnY9cf22d+TuYatHjZ2otD1X+M7TGpB9rcnhB5UKvmI="/>
+    <link rel="stylesheet" href="https://code.jquery.com/qunit/qunit-2.20.0.css" crossorigin="anonymous" integrity="sha256-NN2oro7r8aYcRYA4fnBbijdLRS7Rc4Pz9ikcmlwWvl4="/>
   </head>
   <body>
     <div id="qunit"></div>
     <div id="qunit-fixture"></div>
-    <script src="https://code.jquery.com/qunit/qunit-2.19.1.js" crossorigin="anonymous" integrity="sha256-JKXf8hYyT6TCyX2GIQgbqsBGOx1Fq4kI0IHuoTxbj44="></script>
+    <script src="https://code.jquery.com/qunit/qunit-2.20.0.js" crossorigin="anonymous" integrity="sha256-qDPbT8viaD6gCaTrUd7FOE5lU5S9H5U5bbuQMADnrRY="></script>
     <script src="./setImmediate.js"></script>
     <script src="./markdownlint-cli2-webworker.js"></script>
     <script src="./fs-virtual.js"></script>
