diff --git a/index.html b/index.html
index 8dde28a4..be4f6a96 100644
--- a/index.html
+++ b/index.html
@@ -190,6 +190,28 @@
     </script>
 
     <!-- Discord SDK is imported in DiscordActivityContext.tsx from @discord/embedded-app-sdk npm package -->
+
+    <!-- Polyfill for crypto.randomUUID for compatibility -->
+    <script>
+      if (!crypto.randomUUID) {
+        crypto.randomUUID = function () {
+          const array = new Uint8Array(16);
+          crypto.getRandomValues(array);
+          array[6] = (array[6] & 0x0f) | 0x40;
+          array[8] = (array[8] & 0x3f) | 0x80;
+          const hex = Array.from(array).map((b) =>
+            b.toString(16).padStart(2, "0")
+          );
+          return [
+            hex.slice(0, 4).join(""),
+            hex.slice(4, 6).join(""),
+            hex.slice(6, 8).join(""),
+            hex.slice(8, 10).join(""),
+            hex.slice(10, 16).join(""),
+          ].join("-");
+        };
+      }
+    </script>
   </head>
 
   <body>
