diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b53ac8..2094f37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to QingStor SDK for JAVA will be documented in this file.
 
+## [v2.6.6] - 2024-12-24
+
+### Fixed
+
+- Fix the bug that the header `x-qs-date` is not considered in the signature calculation.
+- Fix the bug that decoding versioned delete-object output fails on boolean field.
+- Use -1 as unknown body size hint before parsing the content length.
+
 ## [v2.6.5] - 2024-04-30
 
 ### Added
diff --git a/docs/install.md b/docs/install.md
index f3be06a..a423d40 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -22,7 +22,7 @@ Maven:
 <dependency>
   <groupId>com.yunify</groupId>
   <artifactId>qingstor.sdk.java</artifactId>
-  <version>2.6.5</version>
+  <version>2.6.6</version>
 </dependency>
 ```
 
diff --git a/docs/install_zh-CN.md b/docs/install_zh-CN.md
index ab21b51..d5bf065 100644
--- a/docs/install_zh-CN.md
+++ b/docs/install_zh-CN.md
@@ -22,7 +22,7 @@ Maven:
 <dependency>
   <groupId>com.yunify</groupId>
   <artifactId>qingstor.sdk.java</artifactId>
-  <version>2.6.5</version>
+  <version>2.6.6</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index bddbe12..e589cca 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.yunify</groupId>
     <artifactId>qingstor.sdk.java</artifactId>
-    <version>2.6.5</version>
+    <version>2.6.6</version>
     <name>Qingcloud Qingstor SDK for Java</name>
     <description>The official QingStor SDK for the Java programming language.</description>
     <url>https://www.qingcloud.com/products/objectstorage/</url>
diff --git a/src/main/resources/version.properties b/src/main/resources/version.properties
index 0759335..b978ba7 100644
--- a/src/main/resources/version.properties
+++ b/src/main/resources/version.properties
@@ -1 +1 @@
-version=2.6.5
+version=2.6.6