diff --git a/pkgs/web_socket_channel/CHANGELOG.md b/pkgs/web_socket_channel/CHANGELOG.md
index f29baf9..49b2eec 100644
--- a/pkgs/web_socket_channel/CHANGELOG.md
+++ b/pkgs/web_socket_channel/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 1.0.7
+
+* Updates to support Dart 2.0 core library changes (wave 2.2). 
+  See [issue 31847][sdk#31847] for details.
+
+  [sdk#31847]: https://github.com/dart-lang/sdk/issues/31847
+
 ## 1.0.6
 
 * Declare support for `async` 2.0.0.
diff --git a/pkgs/web_socket_channel/lib/src/copy/web_socket_impl.dart b/pkgs/web_socket_channel/lib/src/copy/web_socket_impl.dart
index 8996619..5c8e1b3 100644
--- a/pkgs/web_socket_channel/lib/src/copy/web_socket_impl.dart
+++ b/pkgs/web_socket_channel/lib/src/copy/web_socket_impl.dart
@@ -66,7 +66,8 @@
 /// will lead to undefined behaviour.
 // TODO(ajohnsen): make this transformer reusable?
 class _WebSocketProtocolTransformer
-    implements StreamTransformer<List<int>, dynamic>, EventSink<List<int>> {
+    extends StreamTransformerBase<List<int>, dynamic>
+    implements EventSink<List<int>> {
   static const int START = 0;
   static const int LEN_FIRST = 1;
   static const int LEN_REST = 2;
@@ -392,7 +393,7 @@
 
 // TODO(ajohnsen): Make this transformer reusable.
 class _WebSocketOutgoingTransformer
-    implements StreamTransformer<dynamic, List<int>>, EventSink {
+    extends StreamTransformerBase<dynamic, List<int>> implements EventSink {
   final WebSocketImpl webSocket;
   EventSink<List<int>> _eventSink;
 
diff --git a/pkgs/web_socket_channel/pubspec.yaml b/pkgs/web_socket_channel/pubspec.yaml
index 48f3bce..08dde58 100644
--- a/pkgs/web_socket_channel/pubspec.yaml
+++ b/pkgs/web_socket_channel/pubspec.yaml
@@ -1,11 +1,11 @@
 name: web_socket_channel
-version: 1.0.6
+version: 1.0.7
 description: StreamChannel wrappers for WebSockets.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/web_socket_channel
 
 environment:
-  sdk: '>=1.13.0 <2.0.0'
+  sdk: '>=2.0.0-dev.20.0 <2.0.0'
 
 dependencies:
   async: '>=1.3.0 <3.0.0'