diff --git a/.github/workflows/supabase_flutter.yml b/.github/workflows/supabase_flutter.yml
index 1bd63b1c2..b46614ef4 100644
--- a/.github/workflows/supabase_flutter.yml
+++ b/.github/workflows/supabase_flutter.yml
@@ -34,7 +34,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        flutter-version: ['3.10.x', '3.x']
+        flutter-version: ['3.19.x', '3.x']
 
     defaults:
       run:
diff --git a/packages/gotrue/lib/src/broadcast_web.dart b/packages/gotrue/lib/src/broadcast_web.dart
index 0c2c2a538..72ba708f0 100644
--- a/packages/gotrue/lib/src/broadcast_web.dart
+++ b/packages/gotrue/lib/src/broadcast_web.dart
@@ -1,28 +1,37 @@
+import 'dart:async';
 import 'dart:convert';
-import 'dart:html' as html;
-import 'dart:js_util' as js_util;
+import 'dart:js_interop';
 
 import 'package:gotrue/src/types/types.dart';
 import 'package:logging/logging.dart';
+import 'package:web/web.dart' as web;
 
 final _log = Logger('supabase.auth');
 
 BroadcastChannel getBroadcastChannel(String broadcastKey) {
-  final broadcast = html.BroadcastChannel(broadcastKey);
-  return (
-    onMessage: broadcast.onMessage.map((event) {
-      final dataMap = js_util.dartify(event.data);
+  final broadcast = web.BroadcastChannel(broadcastKey);
+  final controller = StreamController<Map<String, dynamic>>();
+
+  broadcast.addEventListener(
+    'message',
+    (web.Event event) {
+      if (event is web.MessageEvent) {
+        final dataMap = event.data.dartify();
+        controller.add(json.decode(json.encode(dataMap)));
+      }
+    } as web.EventListener,
+  );
 
-      // some parts have the wrong map type. This is an easy workaround and
-      // should be efficient enough for the small session and user data
-      return json.decode(json.encode(dataMap));
-    }),
+  return (
+    onMessage: controller.stream,
     postMessage: (message) {
       _log.finest('Broadcasting message: $message');
       _log.fine('Broadcasting event: ${message['event']}');
-      final jsMessage = js_util.jsify(message);
-      broadcast.postMessage(jsMessage);
+      broadcast.postMessage(message.jsify() as JSAny);
+    },
+    close: () {
+      broadcast.close();
+      controller.close();
     },
-    close: broadcast.close,
   );
 }
diff --git a/packages/gotrue/lib/src/gotrue_client.dart b/packages/gotrue/lib/src/gotrue_client.dart
index fcf4182d2..96e020b3e 100644
--- a/packages/gotrue/lib/src/gotrue_client.dart
+++ b/packages/gotrue/lib/src/gotrue_client.dart
@@ -11,12 +11,12 @@ import 'package:gotrue/src/types/auth_response.dart';
 import 'package:gotrue/src/types/fetch_options.dart';
 import 'package:http/http.dart';
 import 'package:jwt_decode/jwt_decode.dart';
+import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:retry/retry.dart';
 import 'package:rxdart/subjects.dart';
-import 'package:logging/logging.dart';
 
-import 'broadcast_stub.dart' if (dart.library.html) './broadcast_web.dart'
+import 'broadcast_stub.dart' if (dart.library.js_interop) './broadcast_web.dart'
     as web;
 import 'version.dart';
 
@@ -363,8 +363,8 @@ class GoTrueClient {
       ),
     );
 
-    await _asyncStorage!
-        .removeItem(key: '${Constants.defaultStorageKey}-code-verifier');
+    await _asyncStorage.removeItem(
+        key: '${Constants.defaultStorageKey}-code-verifier');
 
     final authSessionUrlResponse = AuthSessionUrlResponse(
         session: Session.fromJson(response)!, redirectType: redirectType?.name);
@@ -1163,7 +1163,7 @@ class GoTrueClient {
   }
 
   void _mayStartBroadcastChannel() {
-    if (const bool.fromEnvironment('dart.library.html')) {
+    if (const bool.fromEnvironment('dart.library.js_interop')) {
       // Used by the js library as well
       final broadcastKey =
           "sb-${Uri.parse(_url).host.split(".").first}-auth-token";
diff --git a/packages/gotrue/lib/src/types/auth_state.dart b/packages/gotrue/lib/src/types/auth_state.dart
index c610790a9..ec703011b 100644
--- a/packages/gotrue/lib/src/types/auth_state.dart
+++ b/packages/gotrue/lib/src/types/auth_state.dart
@@ -5,7 +5,7 @@ class AuthState {
   final AuthChangeEvent event;
   final Session? session;
 
-  /// Whether this state was broadcasted via `html.ChannelBroadcast` on web from
+  /// Whether this state was broadcasted via `web.BroadcastChannel` on web from
   /// another tab or window.
   final bool fromBroadcast;
 
diff --git a/packages/gotrue/pubspec.yaml b/packages/gotrue/pubspec.yaml
index f17c86d90..e240341d1 100644
--- a/packages/gotrue/pubspec.yaml
+++ b/packages/gotrue/pubspec.yaml
@@ -6,7 +6,7 @@ repository: 'https://github.com/supabase/supabase-flutter/tree/main/packages/got
 documentation: 'https://supabase.com/docs/reference/dart/auth-signup'
 
 environment:
-  sdk: '>=3.0.0 <4.0.0'
+  sdk: '>=3.3.0 <4.0.0'
 
 dependencies:
   collection: ^1.15.0
@@ -17,6 +17,7 @@ dependencies:
   rxdart: '>=0.27.7 <0.29.0'
   meta: ^1.7.0
   logging: ^1.2.0
+  web: '>=0.5.0 <2.0.0'
 
 dev_dependencies:
   dart_jsonwebtoken: ^2.4.1
diff --git a/packages/gotrue/test/src/broadcast_web_test.dart b/packages/gotrue/test/src/broadcast_web_test.dart
new file mode 100644
index 000000000..2808723a2
--- /dev/null
+++ b/packages/gotrue/test/src/broadcast_web_test.dart
@@ -0,0 +1,57 @@
+@TestOn('browser')
+import 'dart:async';
+
+import 'package:gotrue/src/broadcast_web.dart';
+import 'package:gotrue/src/types/types.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('getBroadcastChannel', () {
+    late BroadcastChannel channel1;
+    late BroadcastChannel channel2;
+
+    setUp(() {
+      channel1 = getBroadcastChannel('test-channel');
+      channel2 = getBroadcastChannel('test-channel');
+    });
+
+    tearDown(() {
+      channel1.close();
+      channel2.close();
+    });
+
+    test('can send and receive messages between channels', () async {
+      final completer = Completer<Map<String, dynamic>>();
+
+      // Listen for messages on channel2
+      final subscription = channel2.onMessage.listen((message) {
+        completer.complete(message);
+      });
+
+      // Send message from channel1
+      final testMessage = {
+        'event': 'test-event',
+        'data': {'foo': 'bar'}
+      };
+      channel1.postMessage(testMessage);
+
+      // Wait for the message to be received
+      final receivedMessage = await completer.future;
+
+      expect(receivedMessage['event'], equals('test-event'));
+      expect(receivedMessage['data']['foo'], equals('bar'));
+
+      await subscription.cancel();
+    });
+
+    test('can close channels', () async {
+      channel1.close();
+
+      // Verify that sending messages after closing throws
+      expect(
+        () => channel1.postMessage({'event': 'test'}),
+        throwsA(anything),
+      );
+    });
+  });
+}
diff --git a/packages/realtime_client/lib/src/websocket/websocket.dart b/packages/realtime_client/lib/src/websocket/websocket.dart
index 9c6c59667..67bc281c4 100644
--- a/packages/realtime_client/lib/src/websocket/websocket.dart
+++ b/packages/realtime_client/lib/src/websocket/websocket.dart
@@ -1,3 +1,3 @@
 export 'websocket_stub.dart'
     if (dart.library.io) 'websocket_io.dart'
-    if (dart.library.html) 'websocket_web.dart';
+    if (dart.library.js_interop) 'websocket_web.dart';
diff --git a/packages/supabase/pubspec.yaml b/packages/supabase/pubspec.yaml
index 993caabfc..eac131369 100644
--- a/packages/supabase/pubspec.yaml
+++ b/packages/supabase/pubspec.yaml
@@ -6,7 +6,7 @@ repository: 'https://github.com/supabase/supabase-flutter/tree/main/packages/sup
 documentation: 'https://supabase.com/docs/reference/dart/introduction'
 
 environment:
-  sdk: '>=3.0.0 <4.0.0'
+  sdk: '>=3.3.0 <4.0.0'
 
 dependencies:
   functions_client: 2.4.1
diff --git a/packages/supabase_flutter/lib/src/local_storage.dart b/packages/supabase_flutter/lib/src/local_storage.dart
index 7b2015849..d3622ea28 100644
--- a/packages/supabase_flutter/lib/src/local_storage.dart
+++ b/packages/supabase_flutter/lib/src/local_storage.dart
@@ -6,7 +6,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 
 import './local_storage_stub.dart'
-    if (dart.library.html) './local_storage_web.dart' as web;
+    if (dart.library.js_interop) './local_storage_web.dart' as web;
 
 /// Only used for migration from Hive to SharedPreferences. Not actually in use.
 const supabasePersistSessionKey = 'SUPABASE_PERSIST_SESSION_KEY';
@@ -70,7 +70,7 @@ class SharedPreferencesLocalStorage extends LocalStorage {
 
   final String persistSessionKey;
   static const _useWebLocalStorage =
-      kIsWeb && bool.fromEnvironment("dart.library.html");
+      kIsWeb && bool.fromEnvironment("dart.library.js_interop");
 
   @override
   Future<void> initialize() async {
diff --git a/packages/supabase_flutter/pubspec.yaml b/packages/supabase_flutter/pubspec.yaml
index 6919637e5..d0cfde90d 100644
--- a/packages/supabase_flutter/pubspec.yaml
+++ b/packages/supabase_flutter/pubspec.yaml
@@ -6,8 +6,8 @@ repository: 'https://github.com/supabase/supabase-flutter/tree/main/packages/sup
 documentation: 'https://supabase.com/docs/reference/dart/introduction'
 
 environment:
-  sdk: '>=3.0.0 <4.0.0'
-  flutter: '>=3.0.0'
+  sdk: '>=3.3.0 <4.0.0'
+  flutter: '>=3.19.0'
 
 dependencies:
   app_links: '>=3.5.0 <7.0.0'