diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52fa910..4fcbdc6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.2.2
+
+- updates for Dart 2
+
 ## 0.2.1
 
 - update the styles for the directory listings to use
diff --git a/analysis_options.yaml b/analysis_options.yaml
index 2510694..6ee867f 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,6 +1,3 @@
-analyzer:
-  strong-mode: true
-
 linter:
   rules:
     - always_declare_return_types
diff --git a/lib/src/directories.dart b/lib/src/directories.dart
index d10057f..8305bf0 100644
--- a/lib/src/directories.dart
+++ b/lib/src/directories.dart
@@ -170,5 +170,5 @@ Response listDirectory(String appName, String fileSystemPath, String dirPath) {
   });
 
   return new Response.ok(controller.stream,
-      encoding: encoding, headers: {HttpHeaders.CONTENT_TYPE: 'text/html'});
+      encoding: encoding, headers: {HttpHeaders.contentTypeHeader: 'text/html'});
 }
diff --git a/lib/src/packages.dart b/lib/src/packages.dart
index 6bf2330..8b89c1b 100644
--- a/lib/src/packages.dart
+++ b/lib/src/packages.dart
@@ -104,13 +104,13 @@ Future<Response> _handleFile(Request request, File file) async {
   }
 
   var headers = {
-    HttpHeaders.CONTENT_LENGTH: stat.size.toString(),
-    HttpHeaders.LAST_MODIFIED: formatHttpDate(stat.changed)
+    HttpHeaders.contentLengthHeader: stat.size.toString(),
+    HttpHeaders.lastModifiedHeader: formatHttpDate(stat.changed)
   };
 
   String contentType = _mimeTypeResolver.lookup(file.path);
   if (contentType != null) {
-    headers[HttpHeaders.CONTENT_TYPE] = contentType;
+    headers[HttpHeaders.contentTypeHeader] = contentType;
   }
 
   return new Response.ok(file.openRead(), headers: headers);
diff --git a/pubspec.yaml b/pubspec.yaml
index caf247e..1fd004c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: mserve
 description: A small (micro) web server.
-version: 0.2.1
+version: 0.2.2
 author: Devon Carew <devoncarew@gmail.com>
 homepage: https://github.com/devoncarew/mserve.dart
 
 environment:
-  sdk: '>=2.0.0-dev.30 <2.0.0'
+  sdk: '>=2.0.0-dev.30 <3.0.0'
 
 dependencies:
   args: ^1.0.0
@@ -20,7 +20,7 @@ dependencies:
   shelf_static: ^0.2.0
 
 dev_dependencies:
-  test: ^0.12.0
+  test: ^1.0.0
 
 executables:
   mserve: null