Require Dart >=1.22.0
diff --git a/.travis.yml b/.travis.yml
index 6788dee..87adf20 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@
 dart:
   - dev
   - stable
-  - 1.21.1
+  - 1.22.1
 
 dart_task:
   - test
diff --git a/pubspec.yaml b/pubspec.yaml
index 7d56fb6..cbf7e47 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: shelf_packages_handler
-version: 1.0.2
+version: 1.0.3-dev
 description: A shelf handler for serving a `packages/` directory.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/shelf_packages_handler
 
 environment:
-  sdk: '>=1.21.0 <2.0.0'
+  sdk: '>=1.22.0 <2.0.0'
 
 dependencies:
   async: '^1.1.0'