diff --git a/pubspec.yaml b/pubspec.yaml
index 3c2ef8d..868b0fb 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: socket_io_client
 description: Dartlang port of socket.io-client
-version: 0.9.0
+version: 0.9.0+1
 author: jumperchen <jumperchen@potix.com>
 homepage: https://www.zkoss.org
 
 environment:
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.0.0 <3.0.0"
 
 dependencies:
   logging: ^0.11.3+2