diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d8e8477..50274fa1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # ChangeLog - Aliyun OSS SDK for PHP
 
+## v2.4.2 / 2021-06-04
+* Compatible with PHP8.
+* Fixed: compatible with PHP5.4.
+* Fixed: the signature is incorrect in some scenarios
+* Update: change $requestUrl from a member variable to a local variable.
+
 ## v2.4.1 / 2020-09-29
 * Fixed: the getBucketPolicy bug.
 
diff --git a/src/OSS/OssClient.php b/src/OSS/OssClient.php
index 54933b7f..c41cacda 100644
--- a/src/OSS/OssClient.php
+++ b/src/OSS/OssClient.php
@@ -3508,8 +3508,8 @@ public function setConnectTimeout($connectTimeout)
     );
     // OssClient version information
     const OSS_NAME = "aliyun-sdk-php";
-    const OSS_VERSION = "2.4.1";
-    const OSS_BUILD = "20200929";
+    const OSS_VERSION = "2.4.2";
+    const OSS_BUILD = "20210604";
     const OSS_AUTHOR = "";
     const OSS_OPTIONS_ORIGIN = 'Origin';
     const OSS_OPTIONS_REQUEST_METHOD = 'Access-Control-Request-Method';