diff --git a/lib/isolate_runner.dart b/lib/isolate_runner.dart
index 2d18095..fbfe4d6 100644
--- a/lib/isolate_runner.dart
+++ b/lib/isolate_runner.dart
@@ -101,13 +101,13 @@
   Future kill({Duration timeout: const Duration(seconds: 1)}) {
     Future onExit = singleResponseFuture(isolate.addOnExitListener);
     if (Duration.ZERO == timeout) {
-      isolate.kill(Isolate.IMMEDIATE);
+      isolate.kill(priority: Isolate.IMMEDIATE);
       return onExit;
     } else {
       // Try a more gentle shutdown sequence.
       _commandPort.send(list1(_SHUTDOWN));
       return onExit.timeout(timeout, onTimeout: () {
-        isolate.kill(Isolate.IMMEDIATE);
+        isolate.kill(priority: Isolate.IMMEDIATE);
         return onExit;
       });
     }
diff --git a/pubspec.yaml b/pubspec.yaml
index a51456a..a8d92af 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,9 +1,9 @@
 name: isolate
-version: 0.2.1-dev
+version: 0.2.2
 author: Dart Team <misc@dartlang.org>
 description: Utility functions and classes related to the 'dart:isolate' library.
 homepage: https://github.com/dart-lang/isolate
 environment:
-  sdk: '>=1.9.0-dev <2.0.0'
+  sdk: '>=1.11.0-dev <2.0.0'
 dev_dependencies:
   unittest: '>=0.10.0 <0.12.0'