diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b53ac80..2094f375 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/Makefile b/Makefile
index b6cbb6e1..5163cef4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,13 @@
 SHELL := /bin/bash
 
+.PHONY: help all test unit build update generate
+
 help:
 	@echo "Please use \`make <target>' where <target> is one of"
 	@echo "  all               to update, generate and test this SDK"
 	@echo "  test              to run service test"
 	@echo "  unit              to run all sort of unit tests except runtime"
+	@echo "  build             to build jar"
 	@echo "  update            to update git submodules"
 	@echo "  generate          to generate service code"
 
diff --git a/docs/install.md b/docs/install.md
index f3be06ad..a423d40e 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 ab21b515..d5bf0659 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 86505c75..e589cca2 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>
@@ -40,6 +40,7 @@
 
     <dependencies>
         <dependency>
+            <!-- okio < 3.0.0. https://github.com/square/okio/pull/818 -->
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
             <version>4.12.0</version>
@@ -269,7 +270,7 @@
                     <java>
                         <!-- apply a specific flavor of google-java-format and reflow long strings -->
                         <googleJavaFormat>
-                            <version>1.10.0</version>
+                            <version>1.7</version>
                             <style>AOSP</style>
                         </googleJavaFormat>
 
diff --git a/src/main/java/com/qingstor/sdk/constants/QSConstant.java b/src/main/java/com/qingstor/sdk/constants/QSConstant.java
index 83e0453f..6c427db7 100644
--- a/src/main/java/com/qingstor/sdk/constants/QSConstant.java
+++ b/src/main/java/com/qingstor/sdk/constants/QSConstant.java
@@ -64,6 +64,7 @@ public class QSConstant {
     public static final String ENV_CONTEXT_KEY = "envContext";
 
     public static final String HEADER_PARAM_KEY_DATE = "Date";
+    public static final String HEADER_PARAM_KEY_QS_DATE = "x-qs-date";
 
     public static final String HEADER_PARAM_KEY_EXPIRES = "Expires";
 
diff --git a/src/main/java/com/qingstor/sdk/utils/QSJSONUtil.java b/src/main/java/com/qingstor/sdk/utils/QSJSONUtil.java
index c398dbfb..becc2af5 100644
--- a/src/main/java/com/qingstor/sdk/utils/QSJSONUtil.java
+++ b/src/main/java/com/qingstor/sdk/utils/QSJSONUtil.java
@@ -530,6 +530,8 @@ private static Object getParseValue(Class type, Object value) {
             return Long.parseLong(value.toString());
         } else if (Float.class.equals(type) || "float".equals(type.toString())) {
             return Float.parseFloat(value.toString());
+        } else if (Boolean.class.equals(type) || "boolean".equals(type.toString())) {
+            return Boolean.parseBoolean(value.toString());
         }
         return value;
     }
diff --git a/src/main/java/com/qingstor/sdk/utils/QSSignatureUtil.java b/src/main/java/com/qingstor/sdk/utils/QSSignatureUtil.java
index 0b55c05f..c212e51a 100644
--- a/src/main/java/com/qingstor/sdk/utils/QSSignatureUtil.java
+++ b/src/main/java/com/qingstor/sdk/utils/QSSignatureUtil.java
@@ -213,11 +213,12 @@ public static String getStringToSignature(
         // Append request time as string
         String dateStr = "";
         if (headers != null) {
-            if (headers.containsKey(QSConstant.HEADER_PARAM_KEY_DATE)) {
-                dateStr = headers.get(QSConstant.HEADER_PARAM_KEY_DATE);
-            }
             if (headers.containsKey(QSConstant.HEADER_PARAM_KEY_EXPIRES)) {
                 dateStr = headers.get(QSConstant.HEADER_PARAM_KEY_EXPIRES);
+            } else {
+                if (!headers.containsKey(QSConstant.HEADER_PARAM_KEY_QS_DATE)) {
+                    dateStr = headers.get(QSConstant.HEADER_PARAM_KEY_DATE);
+                }
             }
         }
         sb.append("\n").append(dateStr);
diff --git a/src/main/resources/version.properties b/src/main/resources/version.properties
index 0759335f..b978ba7d 100644
--- a/src/main/resources/version.properties
+++ b/src/main/resources/version.properties
@@ -1 +1 @@
-version=2.6.5
+version=2.6.6