diff --git a/CHANGELOG.md b/CHANGELOG.md
index af747559..0c06c83a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,8 @@
 # CHANGELOG
 
-## 2.0.0 - 2019-04-15
+## 1.3.0 - 2019-04-18
 - Improved parameters methods.
-- Abolished method starting with `set` by exception message.
-- Abolish DeprecatedTrait by exception message.
+- Optimized the logic for body encode.
 
 
 ## 1.2.1 - 2019-04-11
diff --git a/UPGRADING.md b/UPGRADING.md
index f7673d50..08c1bb33 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -1,12 +1,6 @@
 Upgrading Guide
 ===============
 
-Upgrade from 1.x to 2.x
------------------------
-- Formally abandon the method that the previous table is about to be abolished.
-- Improved parameters methods.
-
-
 1.x
 -----------------------
 - This is the first version. See <https://github.com/aliyun/openapi-sdk-php-client> for more information.
diff --git a/src/AlibabaCloud.php b/src/AlibabaCloud.php
index 24a61988..b2f34041 100644
--- a/src/AlibabaCloud.php
+++ b/src/AlibabaCloud.php
@@ -30,7 +30,7 @@ class AlibabaCloud
     /**
      * Version of the Client
      */
-    const VERSION = '2.0.0';
+    const VERSION = '1.3.0';
 
     /**
      * This static method can directly call the specific service.