diff --git a/example/pubspec.lock b/example/pubspec.lock
index e054384..da5e34a 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -491,6 +491,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: d43c1d6b787bf0afad444700ae7f4db8827f701bc61c255ac8d328c6f4d52062
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   web_socket_channel:
     dependency: transitive
     description:
@@ -524,5 +532,5 @@ packages:
     source: hosted
     version: "3.1.1"
 sdks:
-  dart: ">=3.3.0 <4.0.0"
+  dart: ">=3.4.0 <4.0.0"
   flutter: ">=3.18.0-18.0.pre.54"
diff --git a/example/web/index.html b/example/web/index.html
index d650fa8..74dcd35 100644
--- a/example/web/index.html
+++ b/example/web/index.html
@@ -30,16 +30,6 @@
   <link rel="manifest" href="manifest.json">
 </head>
 <body>
-  <!-- This script installs service_worker.js to provide PWA functionality to
-       application. For more information, see:
-       https://developers.google.com/web/fundamentals/primers/service-workers -->
-  <script>
-    if ('serviceWorker' in navigator) {
-      window.addEventListener('flutter-first-frame', function () {
-        navigator.serviceWorker.register('flutter_service_worker.js');
-      });
-    }
-  </script>
-  <script src="main.dart.js" type="application/javascript"></script>
+  <script src="flutter_bootstrap.js" async></script>
 </body>
 </html>
diff --git a/lib/web/rsa_web.dart b/lib/web/rsa_web.dart
index 6f73db9..55d88a9 100644
--- a/lib/web/rsa_web.dart
+++ b/lib/web/rsa_web.dart
@@ -1,21 +1,24 @@
 import 'dart:async';
-import 'dart:collection';
-import 'dart:html';
+import 'dart:js_interop';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
+import 'package:web/web.dart';
 
 class FastRsaPlugin {
   var _counter = 0;
-  Worker worker = new Worker('assets/packages/fast_rsa/web/assets/worker.js');
+  Worker worker = Worker(
+    'assets/packages/fast_rsa/web/assets/worker.js'.toJS,
+  );
   Map<String, Completer<Uint8List>> completers = {};
 
   static void registerWith(Registrar registrar) {
     final MethodChannel channel = MethodChannel(
-        'fast_rsa',
-        const StandardMethodCodec(),
-        // ignore: deprecated_member_use
-        registrar.messenger);
+      'fast_rsa',
+      const StandardMethodCodec(),
+      // ignore: deprecated_member_use
+      registrar.messenger,
+    );
     final FastRsaPlugin instance = FastRsaPlugin();
     instance.listen();
     channel.setMethodCallHandler(instance.handleMethodCall);
@@ -26,19 +29,23 @@ class FastRsaPlugin {
   }
 
   void listen() async {
-    worker.onMessage.listen((event) {
-      LinkedHashMap<dynamic, dynamic> data = event.data;
-      var completer = completers[data['id']];
+    void _onMessage(Event event) {
+      final msgEvent = event as MessageEvent;
+      final data = msgEvent.data as RsaResponse;
+      var completer = completers[data.id];
       if (completer == null) {
         return;
       }
-      if (data['error'] != null && data['error'] != "") {
-        completer.completeError(data['error']);
+      if (data.error != null && data.error! != '') {
+        completer.completeError(data.error!);
       } else {
-        completer.complete(data['response']);
+        completer.complete(data.response?.toDart);
       }
-      completers.remove(data['id']);
-    });
+      completers.remove(data.id);
+    }
+
+    worker.onmessage = _onMessage.toJS;
+    // worker.addEventListener('message', _onMessage.toJS);
   }
 
   Future<Uint8List> bridgeCall(String name, Uint8List? /*!*/ request) async {
@@ -46,7 +53,39 @@ class FastRsaPlugin {
     var id = _counter.toString();
     var completer = new Completer<Uint8List>();
     completers[id] = completer;
-    worker.postMessage({'id': id, 'name': name, 'request': request});
+    worker.postMessage(RsaRequest(
+      id: id,
+      name: name,
+      request: request?.toJS,
+    ));
     return completer.future;
   }
 }
+
+@JS()
+@anonymous
+extension type RsaRequest._(JSObject _) implements JSObject {
+  external String id;
+  external String name;
+  external JSUint8Array? request;
+
+  external RsaRequest({
+    String id,
+    String name,
+    JSUint8Array? request,
+  });
+}
+
+@JS()
+@anonymous
+extension type RsaResponse._(JSObject _) implements JSObject {
+  external String id;
+  external String? error;
+  external JSUint8Array? response;
+
+  external RsaResponse({
+    String id,
+    String? error,
+    JSUint8Array? response,
+  });
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index 2e93409..38634d9 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ version: 3.6.3
 homepage: https://github.com/jerson/flutter-rsa
 
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=3.3.0 <4.0.0'
   flutter: ">=1.10.0"
 
 false_secrets:
@@ -18,6 +18,7 @@ dependencies:
   ffi: ^2.0.1
   flat_buffers: ^2.0.5
   path: ^1.8.2
+  web: ">=0.5.0 <2.0.0"
 
 dev_dependencies:
   flutter_test:
