Require Uri.

diff --git a/pkgs/web_socket_channel/lib/src/_connect_api.dart b/pkgs/web_socket_channel/lib/src/_connect_api.dart
index 13d22eb..93c6ce7 100644
--- a/pkgs/web_socket_channel/lib/src/_connect_api.dart
+++ b/pkgs/web_socket_channel/lib/src/_connect_api.dart

@@ -6,9 +6,8 @@
 
 /// Creates a new WebSocket connection.
 ///
-/// Connects to [url] using and returns a channel that can be used to
-/// communicate over the resulting socket. The [url] may be either a [String]
-/// or a [Uri].
-WebSocketChannel connect(String url) {
+/// Connects to [uri] using and returns a channel that can be used to
+/// communicate over the resulting socket.
+WebSocketChannel connect(Uri uri) {
   throw UnsupportedError('No implementation of the connect api provided');
 }

diff --git a/pkgs/web_socket_channel/lib/src/_connect_html.dart b/pkgs/web_socket_channel/lib/src/_connect_html.dart
index d8e5ec7..3c36641 100644
--- a/pkgs/web_socket_channel/lib/src/_connect_html.dart
+++ b/pkgs/web_socket_channel/lib/src/_connect_html.dart

@@ -8,7 +8,6 @@
 
 /// Creates a new WebSocket connection.
 ///
-/// Connects to [url] using and returns a channel that can be used to
-/// communicate over the resulting socket. The [url] may be either a [String]
-/// or a [Uri].
-WebSocketChannel connect(url) => HtmlWebSocketChannel.connect(url);
+/// Connects to [uri] using and returns a channel that can be used to
+/// communicate over the resulting socket.
+WebSocketChannel connect(Uri uri) => HtmlWebSocketChannel.connect(uri);

diff --git a/pkgs/web_socket_channel/lib/src/_connect_io.dart b/pkgs/web_socket_channel/lib/src/_connect_io.dart
index 80d362d..b788926 100644
--- a/pkgs/web_socket_channel/lib/src/_connect_io.dart
+++ b/pkgs/web_socket_channel/lib/src/_connect_io.dart

@@ -7,7 +7,6 @@
 
 /// Creates a new WebSocket connection.
 ///
-/// Connects to [url] using and returns a channel that can be used to
-/// communicate over the resulting socket. The [url] may be either a [String]
-/// or a [Uri].
-WebSocketChannel connect(url) => IOWebSocketChannel.connect(url);
+/// Connects to [uri] using and returns a channel that can be used to
+/// communicate over the resulting socket
+WebSocketChannel connect(Uri uri) => IOWebSocketChannel.connect(uri);

diff --git a/pkgs/web_socket_channel/lib/src/channel.dart b/pkgs/web_socket_channel/lib/src/channel.dart
index 6bbb3c4..cee27f2 100644
--- a/pkgs/web_socket_channel/lib/src/channel.dart
+++ b/pkgs/web_socket_channel/lib/src/channel.dart

@@ -101,10 +101,9 @@
 
   /// Creates a new WebSocket connection.
   ///
-  /// Connects to [url] using and returns a channel that can be used to
-  /// communicate over the resulting socket. The [url] may be either a [String]
-  /// or a [Uri].
-  factory WebSocketChannel.connect(url) => platform.connect(url);
+  /// Connects to [uri] using and returns a channel that can be used to
+  /// communicate over the resulting socket.
+  factory WebSocketChannel.connect(Uri uri) => platform.connect(uri);
 }
 
 /// The sink exposed by a [WebSocketChannel].

diff --git a/pkgs/web_socket_channel/test/html_test.dart b/pkgs/web_socket_channel/test/html_test.dart
index 75aacfb..b05c8ec 100644
--- a/pkgs/web_socket_channel/test/html_test.dart
+++ b/pkgs/web_socket_channel/test/html_test.dart

@@ -81,7 +81,7 @@
 
   test(".connect defaults to binary lists using platform independent api",
       () async {
-    channel = WebSocketChannel.connect("ws://localhost:$port");
+    channel = WebSocketChannel.connect(Uri.parse("ws://localhost:$port"));
 
     var queue = StreamQueue(channel.stream);
     channel.sink.add("foo");

diff --git a/pkgs/web_socket_channel/test/io_test.dart b/pkgs/web_socket_channel/test/io_test.dart
index b389699..4d4b1a9 100644
--- a/pkgs/web_socket_channel/test/io_test.dart
+++ b/pkgs/web_socket_channel/test/io_test.dart

@@ -81,7 +81,8 @@
       });
     });
 
-    var channel = WebSocketChannel.connect("ws://localhost:${server.port}");
+    var channel =
+        WebSocketChannel.connect(Uri.parse("ws://localhost:${server.port}"));
     channel.sink.add("ping");
 
     channel.stream.listen(