diff --git a/README.md b/README.md
index 12f013f..f400677 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,6 @@ dependencies:
 
 ## Features and Roadmap
 
-Connection related features
-
 - ✅ Connect to a server
 - ✅ Setting client configuration
 - ✅ Automatic reconnect with backoff algorithm
diff --git a/example/main.dart b/example/main.dart
new file mode 100644
index 0000000..696fcf6
--- /dev/null
+++ b/example/main.dart
@@ -0,0 +1,3 @@
+import 'package:spinify/spinify.dart';
+
+void main() => Spinify();
diff --git a/lib/src.old/client/config.dart b/lib/src.old/client/config.dart
index 37b8f20..d5c125f 100644
--- a/lib/src.old/client/config.dart
+++ b/lib/src.old/client/config.dart
@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:meta/meta.dart';
+
 import '../model/pubspec.yaml.g.dart';
 
 /// Token used for authentication
@@ -17,7 +18,7 @@ typedef SpinifyToken = String;
 ///
 /// {@category Client}
 /// {@category Entity}
-typedef SpinifyTokenCallback = FutureOr<SpinifyToken?> Function();
+typedef SpinifyTokenCallback = Future<SpinifyToken?> Function();
 
 /// Callback to get initial connection payload data.
 ///
@@ -25,7 +26,7 @@ typedef SpinifyTokenCallback = FutureOr<SpinifyToken?> Function();
 ///
 /// {@category Client}
 /// {@category Entity}
-typedef SpinifyConnectionPayloadCallback = FutureOr<List<int>?> Function();
+typedef SpinifyConnectionPayloadCallback = Future<List<int>?> Function();
 
 /// {@template spinify_config}
 /// Spinify client common options.
diff --git a/lib/src.old/client/spinify.dart b/lib/src.old/client/spinify.dart
index f443180..6314c83 100644
--- a/lib/src.old/client/spinify.dart
+++ b/lib/src.old/client/spinify.dart
@@ -408,7 +408,7 @@ base mixin SpinifyConnectionMixin
   }
 
   @override
-  FutureOr<void> ready() async {
+  Future<void> ready() async {
     try {
       switch (state) {
         case SpinifyState$Disconnected _:
@@ -767,7 +767,7 @@ base mixin SpinifyQueueMixin on SpinifyBase {
       _eventQueue.push<void>('publish', () => super.publish(channel, data));
 
   /* @override
-  FutureOr<void> ready() => _eventQueue.push<void>('ready', super.ready); */
+  Future<void> ready() => _eventQueue.push<void>('ready', super.ready); */
 
   @override
   Future<SpinifyPresence> presence(String channel) =>
diff --git a/lib/src.old/client/spinify_interface.dart b/lib/src.old/client/spinify_interface.dart
index 5158298..c3e9c88 100644
--- a/lib/src.old/client/spinify_interface.dart
+++ b/lib/src.old/client/spinify_interface.dart
@@ -31,7 +31,7 @@ abstract interface class ISpinify
 
   /// Ready resolves when client successfully connected.
   /// Throws exceptions if called not in connecting or connected state.
-  FutureOr<void> ready();
+  Future<void> ready();
 
   /// Disconnect from the server.
   Future<void> disconnect([
diff --git a/lib/src.old/subscription/client_subscription_impl.dart b/lib/src.old/subscription/client_subscription_impl.dart
index 90d9abe..6f17eb0 100644
--- a/lib/src.old/subscription/client_subscription_impl.dart
+++ b/lib/src.old/subscription/client_subscription_impl.dart
@@ -310,7 +310,7 @@ base mixin SpinifyClientSubscriptionSubscribeMixin
 
   /// Await for subscription to be ready.
   @override
-  FutureOr<void> ready() async {
+  Future<void> ready() async {
     try {
       switch (state) {
         case SpinifySubscriptionState$Unsubscribed _:
diff --git a/lib/src.old/subscription/server_subscription_impl.dart b/lib/src.old/subscription/server_subscription_impl.dart
index 0297568..35ea2ad 100644
--- a/lib/src.old/subscription/server_subscription_impl.dart
+++ b/lib/src.old/subscription/server_subscription_impl.dart
@@ -254,7 +254,7 @@ base mixin SpinifyServerSubscriptionReadyMixin
     on SpinifyServerSubscriptionBase, SpinifyServerSubscriptionErrorsMixin {
   /// Await for subscription to be ready.
   @override
-  FutureOr<void> ready() async {
+  Future<void> ready() async {
     try {
       switch (state) {
         case SpinifySubscriptionState$Unsubscribed _:
@@ -409,7 +409,7 @@ base mixin SpinifyServerSubscriptionQueueMixin
   final SpinifyEventQueue _eventQueue = SpinifyEventQueue();
 
   @override
-  FutureOr<void> ready() => _eventQueue.push<void>(
+  Future<void> ready() => _eventQueue.push<void>(
         'ready',
         super.ready,
       );
diff --git a/lib/src.old/subscription/subscription.dart b/lib/src.old/subscription/subscription.dart
index f268ae4..6c2a4f9 100644
--- a/lib/src.old/subscription/subscription.dart
+++ b/lib/src.old/subscription/subscription.dart
@@ -55,7 +55,7 @@ sealed class SpinifySubscription {
   /// Await for subscription to be ready.
   /// Ready resolves when subscription successfully subscribed.
   /// Throws exceptions if called not in subscribing or subscribed state.
-  FutureOr<void> ready();
+  Future<void> ready();
 
   /// Publish data to current Subscription channel
   Future<void> publish(List<int> data);
diff --git a/lib/src.old/subscription/subscription_config.dart b/lib/src.old/subscription/subscription_config.dart
index 306a503..f7c322a 100644
--- a/lib/src.old/subscription/subscription_config.dart
+++ b/lib/src.old/subscription/subscription_config.dart
@@ -12,7 +12,7 @@ typedef SpinifySubscriptionToken = String;
 /// If method returns null then subscription will be established without token.
 /// {@category Subscription}
 /// {@category Entity}
-typedef SpinifySubscriptionTokenCallback = FutureOr<SpinifySubscriptionToken?>
+typedef SpinifySubscriptionTokenCallback = Future<SpinifySubscriptionToken?>
     Function();
 
 /// Callback to set subscription payload data.
@@ -21,7 +21,7 @@ typedef SpinifySubscriptionTokenCallback = FutureOr<SpinifySubscriptionToken?>
 
 /// {@category Subscription}
 /// {@category Entity}
-typedef SpinifySubscribePayloadCallback = FutureOr<List<int>?> Function();
+typedef SpinifySubscribePayloadCallback = Future<List<int>?> Function();
 
 /// {@template subscription_config}
 /// Subscription common options
diff --git a/lib/src.old/util/event_queue.dart b/lib/src.old/util/event_queue.dart
index 85c4ef4..8207870 100644
--- a/lib/src.old/util/event_queue.dart
+++ b/lib/src.old/util/event_queue.dart
@@ -14,7 +14,7 @@ final class SpinifyEventQueue {
   bool _isClosed = false;
 
   /// Push it at the end of the queue.
-  Future<T> push<T>(String id, FutureOr<T> Function() fn) {
+  Future<T> push<T>(String id, Future<T> Function() fn) {
     final task = SpinifyTask<T>(id, fn);
     _queue.add(task);
     _exec();
@@ -24,7 +24,7 @@ final class SpinifyEventQueue {
   /// Mark the queue as closed.
   /// The queue will be processed until it's empty.
   /// But all new and current events will be rejected with [WSClientClosed].
-  FutureOr<void> close() async {
+  Future<void> close() async {
     _isClosed = true;
     await _processing;
   }
@@ -64,7 +64,7 @@ final class SpinifyEventQueue {
 /// Task for the [SpinifyEventQueue].
 class SpinifyTask<T> {
   /// Create a new instance of [SpinifyTask].
-  SpinifyTask(this.id, FutureOr<T> Function() fn)
+  SpinifyTask(this.id, Future<T> Function() fn)
       : _fn = fn,
         _completer = Completer<T>();
 
@@ -73,13 +73,13 @@ class SpinifyTask<T> {
   /// Unique identifier for the task.
   final String id;
 
-  final FutureOr<T> Function() _fn;
+  final Future<T> Function() _fn;
 
   /// Future of the task.
   Future<T> get future => _completer.future;
 
   /// Execute the task.
-  FutureOr<T> call() async {
+  Future<T> call() async {
     final result = await _fn();
     if (!_completer.isCompleted) {
       _completer.complete(result);