diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58260bd..edca829 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 cos-php-sdk-v5 Upgrade Guide
 ====================
+2.6.14 to 2.6.15
+---------
+1. 通过API使用极智压缩
+2. 图片单次审核同步接口使用URL方式报错问题修复
+3. 补充文件提交文件解压任务UnCompressKey参数
+
 2.6.13 to 2.6.14
 ---------
 修复部分问题
diff --git a/src/Client.php b/src/Client.php
index 0bcb84c..3aa1ac4 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -281,7 +281,7 @@
  * @see \Qcloud\Cos\Service::getService()
  */
 class Client extends GuzzleClient {
-    const VERSION = '2.6.14';
+    const VERSION = '2.6.15';
 
     public $httpClient;