diff --git a/CHANGELOG.md b/CHANGELOG.md
index dba247e..b47a7b1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 # Changelog
 
 --------------------------------------------
+[1.1.1] - 2023-08-14
+
+* Add more async methods.
+
 [1.1.0] - 2023-06-29
 
 * Add FrameCryptor interface.
diff --git a/lib/src/media_stream.dart b/lib/src/media_stream.dart
index 0f6d698..8590875 100644
--- a/lib/src/media_stream.dart
+++ b/lib/src/media_stream.dart
@@ -55,7 +55,9 @@ abstract class MediaStream {
   }
 
   /// Clones the given [MediaStream] and all its tracks.
-  Future<MediaStream> clone();
+  Future<MediaStream> clone() {
+    throw UnimplementedError();
+  }
 
   Future<void> dispose() async {
     return Future.value();
diff --git a/lib/src/media_stream_track.dart b/lib/src/media_stream_track.dart
index 0374b78..c7f9b8f 100644
--- a/lib/src/media_stream_track.dart
+++ b/lib/src/media_stream_track.dart
@@ -66,7 +66,9 @@ abstract class MediaStreamTrack {
   //   throw UnimplementedError();
   // }
 
-  // MediaStreamTrack clone();
+  Future<MediaStreamTrack> clone() async {
+    throw UnimplementedError();
+  }
 
   Future<void> stop();
 
diff --git a/lib/src/rtc_peerconnection.dart b/lib/src/rtc_peerconnection.dart
index 3cb5531..a7d26d0 100644
--- a/lib/src/rtc_peerconnection.dart
+++ b/lib/src/rtc_peerconnection.dart
@@ -34,12 +34,28 @@ abstract class RTCPeerConnection {
 
   RTCSignalingState? get signalingState;
 
+  Future<RTCSignalingState?> getSignalingState() async {
+    return signalingState;
+  }
+
   RTCIceGatheringState? get iceGatheringState;
 
+  Future<RTCIceGatheringState?> getIceGatheringState() async {
+    return iceGatheringState;
+  }
+
   RTCIceConnectionState? get iceConnectionState;
 
+  Future<RTCIceConnectionState?> getIceConnectionState() async {
+    return iceConnectionState;
+  }
+
   RTCPeerConnectionState? get connectionState;
 
+  Future<RTCPeerConnectionState?> getConnectionState() async {
+    return connectionState;
+  }
+
   Future<void> dispose();
 
   Map<String, dynamic> get getConfiguration;
diff --git a/pubspec.yaml b/pubspec.yaml
index a601cee..6799c09 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: webrtc_interface
 description: WebRTC Interface for Dart-Web/Flutter.
-version: 1.1.0
+version: 1.1.1
 homepage: https://flutter-webrtc.org
 
 environment: