diff --git a/templates/flutter/lib/src/client_io.dart.twig b/templates/flutter/lib/src/client_io.dart.twig
index 585750759..371dd51ee 100644
--- a/templates/flutter/lib/src/client_io.dart.twig
+++ b/templates/flutter/lib/src/client_io.dart.twig
@@ -314,7 +314,9 @@ class ClientIO extends ClientBase with ClientMixin {
       callbackUrlScheme: callbackUrlScheme != null && _customSchemeAllowed
           ? callbackUrlScheme
           : "{{spec.title | caseLower}}-callback-" + config['project']!,
-      preferEphemeral: true,
+      options: const FlutterWebAuth2Options(
+        intentFlags: ephemeralIntentFlags,
+      ),
     ).then((value) async {
       Uri url = Uri.parse(value);
       final key = url.queryParameters['key'];
diff --git a/templates/flutter/pubspec.yaml.twig b/templates/flutter/pubspec.yaml.twig
index c2463e971..5b0137296 100644
--- a/templates/flutter/pubspec.yaml.twig
+++ b/templates/flutter/pubspec.yaml.twig
@@ -13,15 +13,15 @@ platforms:
   web:
   windows:
 environment:
-  sdk: '>=2.17.0 <3.0.0'
+  sdk: '>=2.17.0 <4.0.0'
 
 dependencies:
   flutter:
     sdk: flutter
   cookie_jar: ^4.0.3
   device_info_plus: ^9.0.2
-  flutter_web_auth_2: ^2.1.4
-  http: '>=0.13.6 <1.0.1'
+  flutter_web_auth_2: ^3.0.0
+  http: '>=0.13.6 <2.0.0'
   package_info_plus: ^4.0.2
   path_provider: ^2.0.15
   web_socket_channel: ^2.4.0
@@ -32,4 +32,4 @@ dev_dependencies:
   flutter_lints: ^2.0.1
   flutter_test:
     sdk: flutter
-  mockito: ^5.4.0
\ No newline at end of file
+  mockito: ^5.4.0