diff --git a/lib/js.dart b/lib/js.dart
index e0622c6..16def2a 100644
--- a/lib/js.dart
+++ b/lib/js.dart
@@ -125,7 +125,7 @@ List _pruneUndefined(arg1, arg2, arg3, arg4, arg5, arg6) {
  * Proxies to JavaScript objects.
  */
 @proxy
-class Proxy implements Serializable<Proxy> {
+class Proxy<T extends Proxy> implements Serializable<T> {
   final js.JsObject _jsObject;
 
   Proxy._(this._jsObject);
@@ -240,8 +240,7 @@ class _CallbackFunction implements Function {
 }
 
 /// A [Proxy] subtype to JavaScript functions.
-class FunctionProxy extends Proxy
-    implements Serializable<FunctionProxy>, Function {
+class FunctionProxy extends Proxy<FunctionProxy> implements Function {
   final js.JsFunction _jsFunction;
   final _thisArg;
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 9df04f1..7c5e8e2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: js
-version: 0.1.0
+version: 0.2.0
 authors:
 - Dart Team <misc@dartlang.org>
 - Alexandre Ardhuin <alexandre.ardhuin@gmail.com>
@@ -7,9 +7,8 @@ description: Access JavaScript from Dart.
 homepage: https://github.com/dart-lang/js-interop
 dependencies:
   browser: '>=0.8.7'
-  meta: '>=0.8.7'
 dev_dependencies:
   ghpages_generator: '>=0.0.1'
   unittest: '>=0.8.7'
 environment:
-  sdk: '>=0.8.7'
+  sdk: '>0.8.7'