diff --git a/pkgs/web_socket_channel/CHANGELOG.md b/pkgs/web_socket_channel/CHANGELOG.md
index 3149059..a74290e 100644
--- a/pkgs/web_socket_channel/CHANGELOG.md
+++ b/pkgs/web_socket_channel/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.1
+
+* Add support for `crypto` 1.0.0.
+
 ## 1.0.0
 
 * Initial version
diff --git a/pkgs/web_socket_channel/lib/src/channel.dart b/pkgs/web_socket_channel/lib/src/channel.dart
index 446eb69..3d1d492 100644
--- a/pkgs/web_socket_channel/lib/src/channel.dart
+++ b/pkgs/web_socket_channel/lib/src/channel.dart
@@ -62,11 +62,9 @@
   ///
   /// [initial handshake]: https://tools.ietf.org/html/rfc6455#section-4.2.2
   static String signKey(String key) {
-    var hash = new SHA1();
     // We use [codeUnits] here rather than UTF-8-decoding the string because
     // [key] is expected to be base64 encoded, and so will be pure ASCII.
-    hash.add((key + webSocketGUID).codeUnits);
-    return CryptoUtils.bytesToBase64(hash.close());
+    return BASE64.encode(sha1.convert((key + webSocketGUID).codeUnits).bytes);
   }
 
   /// Creates a new WebSocket handling messaging across an existing [channel].
diff --git a/pkgs/web_socket_channel/pubspec.yaml b/pkgs/web_socket_channel/pubspec.yaml
index f7b58e5..a4853c9 100644
--- a/pkgs/web_socket_channel/pubspec.yaml
+++ b/pkgs/web_socket_channel/pubspec.yaml
@@ -1,5 +1,5 @@
 name: web_socket_channel
-version: 1.0.0
+version: 1.0.1
 description: StreamChannel wrappers for WebSockets.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/web_socket_channel
@@ -9,7 +9,7 @@
 
 dependencies:
   async: '^1.3.0'
-  crypto: '^0.9.0'
+  crypto: '>=0.9.2 <2.0.0'
   stream_channel: '^1.2.0'
 
 dev_dependencies: