diff --git a/CHANGELOG.md b/CHANGELOG.md
index e69de29..edba1c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -0,0 +1,25 @@
+# Change Log
+All notable changes to QingCloud SDK for Go will be documented in this file.
+
+## [v2.0.0-alpha.2] - 2017-01-05
+
+### Changed
+
+- Fix logger output format, don't parse special characters.
+- Rename package "errs" to "errors".
+
+### Added
+
+- Add type converters.
+
+### BREAKING CHANGES
+
+- Change value type in input and output to pointer.
+
+## v2.0.0-alpha.1 - 2016-12-03
+
+### Added
+
+- QingCloud SDK for the Go programming language.
+
+[v2.0.0-alpha.2]: https://github.com/yunify/qingcloud-sdk-go/compare/v2.0.0-alpha.1...v2.0.0-alpha.2
diff --git a/README.md b/README.md
index 8c80c2d..215fd92 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ Now you are ready to code. You can read the detailed guides in the list below to
 - [Configuration Guide](docs/configuration.md)
 - [QingCloud Service Usage Guide](docs/qingcloud_service_usage.md)
 
-Checkout our [releases](https://github.com/yunify/qingcloud-sdk-go/releases) and [change logs](https://github.com/yunify/qingcloud-sdk-go/blob/master/CHANGELOGS) for information about the latest features, bug fixes and new ideas.
+Checkout our [releases](https://github.com/yunify/qingcloud-sdk-go/releases) and [change logs](https://github.com/yunify/qingcloud-sdk-go/blob/master/CHANGELOG.md) for information about the latest features, bug fixes and new ideas.
 
 ## Reference Documentations
 
diff --git a/version.go b/version.go
index c94c119..83a516b 100644
--- a/version.go
+++ b/version.go
@@ -20,4 +20,4 @@
 package sdk
 
 // Version number.
-const Version = "2.0.0-alpha.1"
+const Version = "2.0.0-alpha.2"