diff --git a/src/Qcloud/Cos/Client.php b/src/Qcloud/Cos/Client.php
index 930e7e70..5559f2b0 100644
--- a/src/Qcloud/Cos/Client.php
+++ b/src/Qcloud/Cos/Client.php
@@ -11,7 +11,7 @@
 use Qcloud\Cos\TokenListener;
 
 class Client extends GSClient {
-    const VERSION = '0.0.3';
+    const VERSION = '1.0.0';
 
     private $region;       // string: region.
     private $credentials;