diff --git a/lib/dart/.analysis_options b/lib/dart/.analysis_options
new file mode 100644
index 0000000..a10d4c5
--- /dev/null
+++ b/lib/dart/.analysis_options
@@ -0,0 +1,2 @@
+analyzer:
+  strong-mode: true
diff --git a/lib/dart/lib/src/transport/t_http_transport.dart b/lib/dart/lib/src/transport/t_http_transport.dart
index bd821f4..aa78e9c 100644
--- a/lib/dart/lib/src/transport/t_http_transport.dart
+++ b/lib/dart/lib/src/transport/t_http_transport.dart
@@ -75,7 +75,7 @@
   final Uri url;
 
   Map<String, String> _headers;
-  get headers => _headers;
+  Map<String, String> get headers => _headers;
 
   THttpConfig(this.url, Map<String, String> headers) {
     if (url == null || !url.hasAuthority) {
diff --git a/lib/dart/lib/src/transport/t_socket_transport.dart b/lib/dart/lib/src/transport/t_socket_transport.dart
index 824260d..8dcdfde 100644
--- a/lib/dart/lib/src/transport/t_socket_transport.dart
+++ b/lib/dart/lib/src/transport/t_socket_transport.dart
@@ -76,7 +76,7 @@
     // Use a sync completer to ensure that the buffer can be read immediately
     // after the read buffer is set, and avoid a race condition where another
     // response could overwrite the read buffer.
-    Completer completer = new Completer.sync();
+    var completer = new Completer<Uint8List>.sync();
     _completers.add(completer);
 
     socket.send(bytes);
@@ -123,7 +123,7 @@
     // Use a sync completer to ensure that the buffer can be read immediately
     // after the read buffer is set, and avoid a race condition where another
     // response could overwrite the read buffer.
-    Completer completer = new Completer.sync();
+    var completer = new Completer<Uint8List>.sync();
     _completers[seqid] = completer;
 
     if (responseTimeout != null) {
diff --git a/lib/dart/pubspec.yaml b/lib/dart/pubspec.yaml
index 53f5450..f7aa876 100644
--- a/lib/dart/pubspec.yaml
+++ b/lib/dart/pubspec.yaml
@@ -22,15 +22,22 @@
 author: Apache Thrift Developers <dev@thrift.apache.org>
 homepage: http://thrift.apache.org
 documentation: http://thrift.apache.org
+
 environment:
   sdk: ">=1.13.0 <2.0.0"
+
 dependencies:
-  fixnum: "^0.10.2"
-  http: "^0.11.3"
-  logging: "^0.11.0"
+  fixnum: ^0.10.2
+  http: ^0.11.3
+  logging: ^0.11.0
+
 dev_dependencies:
-  coverage: "^0.7.2"
-  dart_dev: "^1.0.1"
-  dart_style: "^0.2.0"
-  mockito: "^0.11.0"
-  test: "^0.12.0"
+  # test
+  mockito: ^1.0.0
+  test: ^0.12.0
+
+  # dart_dev - https://github.com/Workiva/dart_dev
+  dart_dev: ^1.5.0
+  coverage: ^0.7.3
+  dart_style: ">=0.2.4 <0.3.0"
+  dartdoc: ^0.9.0
diff --git a/lib/dart/test/serializer/serializer_test_data.dart b/lib/dart/test/serializer/serializer_test_data.dart
index f957e3d..3586f08 100644
--- a/lib/dart/test/serializer/serializer_test_data.dart
+++ b/lib/dart/test/serializer/serializer_test_data.dart
@@ -163,7 +163,7 @@
         if (value == null) {
           unsetL();
         } else {
-          this.l = value;
+          this.l = value as List<String>;
         }
         break;
 
@@ -339,4 +339,4 @@
     // check that fields of type enum have valid values
   }
 
-}
\ No newline at end of file
+}