diff --git a/CHANGELOG.md b/CHANGELOG.md
index f69a8aa..fd6401d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.1.0
+
+* Add generic arguments to `run` in `LoadBalancer` and `IsolateRunner`.
+* Add generic arguments to `singleCallbackPort` and `singleCompletePort`.
+
 ## 1.0.0
 
 * Change to using `package:test` for testing.
diff --git a/lib/ports.dart b/lib/ports.dart
index 7f95e56..5ea6866 100644
--- a/lib/ports.dart
+++ b/lib/ports.dart
@@ -42,16 +42,16 @@
 ///     (new ReceivePort()
 ///         ..first.timeout(duration, () => timeoutValue).then(callback))
 ///         .sendPort
-SendPort singleCallbackPort(void callback(response),
-    {Duration timeout, var timeoutValue}) {
+SendPort singleCallbackPort<T>(void callback(T response),
+    {Duration timeout, T timeoutValue}) {
   RawReceivePort responsePort = new RawReceivePort();
   Zone zone = Zone.current;
   callback = zone.registerUnaryCallback(callback);
-  var timer;
+  Timer timer;
   responsePort.handler = (response) {
     responsePort.close();
     if (timer != null) timer.cancel();
-    zone.runUnary(callback, response);
+    zone.runUnary(callback, response as T);
   };
   if (timeout != null) {
     timer = new Timer(timeout, () {
@@ -87,28 +87,28 @@
 /// completed in response to another event, either a port message or a timer.
 ///
 /// Returns the `SendPort` expecting the single message.
-SendPort singleCompletePort(Completer completer,
-    {callback(message), Duration timeout, onTimeout()}) {
+SendPort singleCompletePort<T>(Completer completer,
+    {callback(T message), Duration timeout, T onTimeout()}) {
   if (callback == null && timeout == null) {
     return singleCallbackPort(completer.complete);
   }
   RawReceivePort responsePort = new RawReceivePort();
-  var timer;
+  Timer timer;
   if (callback == null) {
-    responsePort.handler = (response) {
+    responsePort.handler = (T response) {
       responsePort.close();
       if (timer != null) timer.cancel();
       completer.complete(response);
     };
   } else {
     Zone zone = Zone.current;
-    Function action = zone.registerUnaryCallback((response) {
+    var action = zone.registerUnaryCallback((T response) {
       completer.complete(new Future.sync(() => callback(response)));
     });
     responsePort.handler = (response) {
       responsePort.close();
       if (timer != null) timer.cancel();
-      zone.runUnary(action, response);
+      zone.runUnary(action, response as T);
     };
   }
   if (timeout != null) {
diff --git a/pubspec.yaml b/pubspec.yaml
index 5008df0..9ceba89 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: isolate
-version: 1.0.1-dev
+version: 1.1.0
 author: Dart Team <misc@dartlang.org>
 description: Utility functions and classes related to the 'dart:isolate' library.
 homepage: https://github.com/dart-lang/isolate