diff --git a/CHANGELOG.md b/CHANGELOG.md
index c35c71c..ae3828d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
 ## 1.0.0-beta.1
 
 * Initial publish
+
+## 1.0.0-beta.2
+
+* Add documentation
\ No newline at end of file
diff --git a/example/pubspec.lock b/example/pubspec.lock
index f7ea0cc..7990888 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -150,7 +150,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.0.1"
+    version: "1.0.0-beta.2"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/lib/src/simple_navigator_delegate.dart b/lib/src/simple_navigator_delegate.dart
index 5f86fd9..f4f815b 100644
--- a/lib/src/simple_navigator_delegate.dart
+++ b/lib/src/simple_navigator_delegate.dart
@@ -9,7 +9,7 @@ import 'simple_navigator_route.dart';
 import 'simple_navigator_stack_handler.dart';
 import 'simple_navigator_stack_widget.dart';
 
-final class SimpleNavigatorDelegate extends RouterDelegate<Uri>
+class SimpleNavigatorDelegate extends RouterDelegate<Uri>
     with ChangeNotifier
     implements ISimpleNavigator {
   late final GlobalKey<NavigatorState> _navigatorKey;
diff --git a/lib/src/simple_navigator_params.dart b/lib/src/simple_navigator_params.dart
index df499d6..1a073cb 100644
--- a/lib/src/simple_navigator_params.dart
+++ b/lib/src/simple_navigator_params.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'simple_navigator_route.dart';
 
-final class SimpleNavigatorParams {
+class SimpleNavigatorParams {
   final List<SimpleNavigatorRoute> routes;
   final WidgetBuilder? splash;
   final WidgetBuilder? notFound;
diff --git a/lib/src/simple_navigator_parser.dart b/lib/src/simple_navigator_parser.dart
index d3f829e..b45aca6 100644
--- a/lib/src/simple_navigator_parser.dart
+++ b/lib/src/simple_navigator_parser.dart
@@ -1,7 +1,7 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
-final class SimpleNavigatorParser extends RouteInformationParser<Uri> {
+class SimpleNavigatorParser extends RouteInformationParser<Uri> {
   @override
   Future<Uri> parseRouteInformation(RouteInformation routeInformation) =>
       SynchronousFuture(routeInformation.uri);
diff --git a/pubspec.yaml b/pubspec.yaml
index 3b3d509..d5acb02 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: simple_navigator
 description: This package comes with a simpler alternative to use than the go_router. If your project requires more complex routing, use the go_router.
-version: 1.0.0-beta.1
+version: 1.0.0-beta.3
 homepage: https://github.com/michaelopes/simple_navigator
 license: MIT
 
 environment:
-  sdk: '>=3.1.3 <4.0.0'
+  sdk: '>=2.18.0 <4.0.0'
   flutter: ">=1.17.0"
 
 dependencies: