diff --git a/src/platform/web/LegacyPlatform.js b/src/platform/web/LegacyPlatform.js
index e6bf7774..285cff68 100644
--- a/src/platform/web/LegacyPlatform.js
+++ b/src/platform/web/LegacyPlatform.js
@@ -16,7 +16,7 @@ limitations under the License.
 
 import aesjs from "../../../lib/aes-js/index.js";
 import {hkdf} from "../../utils/crypto/hkdf.js";
-import {Platform as ModernPlatform} from "./Platform.js";
+import {Platform as ModernPlatform} from "./Platform";
 
 export function Platform(container, paths) {
     return new ModernPlatform(container, paths, {aesjs, hkdf});
diff --git a/src/platform/web/Platform.js b/src/platform/web/Platform.ts
similarity index 100%
rename from src/platform/web/Platform.js
rename to src/platform/web/Platform.ts
diff --git a/src/platform/web/docroot/index.html b/src/platform/web/docroot/index.html
index 16f164ae..f427505b 100644
--- a/src/platform/web/docroot/index.html
+++ b/src/platform/web/docroot/index.html
@@ -22,7 +22,7 @@
         </script>
         <script id="main" type="module">
             import {main} from "./src/main.js";
-            import {Platform} from "./src/platform/web/Platform.js";
+            import {Platform} from "./src/platform/web/Platform";
             main(new Platform(document.body, {
                 worker: "src/worker.js",
                 downloadSandbox: "assets/download-sandbox.html",