diff --git a/handlers/playground.html b/handlers/playground.html
index 71da275..e1e7a41 100644
--- a/handlers/playground.html
+++ b/handlers/playground.html
@@ -33,13 +33,23 @@
     <script type="module" src="https://unpkg.com/ninja-keys?module"></script>
     <link
       rel="stylesheet"
-      href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/themes/prism-tomorrow.min.css"
+      href="https://cdnjs.cloudflare.com/ajax/libs/prism/9000.0.1/themes/prism-tomorrow.min.css"
+      integrity="sha512-kSwGoyIkfz4+hMo5jkJngSByil9jxJPKbweYec/UgS+S1EgE45qm4Gea7Ks2oxQ7qiYyyZRn66A9df2lMtjIsw=="
+      crossorigin="anonymous"
+      referrerpolicy="no-referrer"
     />
     <script
-      src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/prism.min.js"
-      data-manual
+      src="https://cdnjs.cloudflare.com/ajax/libs/prism/9000.0.1/prism.min.js"
+      integrity="sha512-UOoJElONeUNzQbbKQbjldDf9MwOHqxNz49NNJJ1d90yp+X9edsHyJoAs6O4K19CZGaIdjI5ohK+O2y5lBTW6uQ=="
+      crossorigin="anonymous"
+      referrerpolicy="no-referrer"
+    ></script>
+    <script
+      src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/4.1.0/js-yaml.min.js"
+      integrity="sha512-CSBhVREyzHAjAFfBlIBakjoRUKp5h7VSweP0InR/pAJyptH7peuhCsqAI/snV+TwZmXZqoUklpXp6R6wMnYf5Q=="
+      crossorigin="anonymous"
+      referrerpolicy="no-referrer"
     ></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/4.1.0/js-yaml.min.js"></script>
     <script>
       const handleThemeChange = () => {
         let theme = localStorage.getItem("theme");