diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25d0d099d..0bc943803 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## milvus-sdk-java 2.6.4 (2025-09-17)
+### Feature
+- Support MINHASH_LSH/IVF_RABITQ index type
+- Support MHJACCARD metric type
+- Support passing request-id and unixmsec to server for MilvusClientV2
+- Support batchDescribeCollection() interface for MilvusClientV2
+- Support FunctionScore, multi-reranker for search/hybridSearch of MilvusClientV2
+- MilvusClientPool supports different ConnectConfig for different key
+
+### Improvement
+- Return shards number of each collection for MilvusClientV2.listCollections()
+
+### Bug
+- Fix a defect of MilvusClientV2.query() that always requires an empty filter expression
+- Fix a bug of QueryIterator that offset value cannot exceed 16384
+
 ## milvus-sdk-java 2.6.3 (2025-08-20)
 ### Improvement
 - Support stageManager & stageFileManager
diff --git a/README.md b/README.md
index 8f24315cf..79eca681c 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ The following table shows compatibilities between Milvus and Java SDK.
 |     2.3.x      |      2.3.11      |
 |     2.4.x      |      2.4.11      |
 |     2.5.x      |      2.5.12      |
-|     2.6.x      |      2.6.3       |
+|     2.6.x      |      2.6.4       |
 
 ### Install Java SDK
 
@@ -34,20 +34,20 @@ You can use **Apache Maven** or **Gradle** add Milvus SDK to your project.
         <dependency>
             <groupId>io.milvus</groupId>
             <artifactId>milvus-sdk-java</artifactId>
-            <version>2.6.3</version>
+            <version>2.6.4</version>
         </dependency>
        ```
 
    - Gradle/Groovy
 
         ```groovy
-        implementation 'io.milvus:milvus-sdk-java:2.6.3'
+        implementation 'io.milvus:milvus-sdk-java:2.6.4'
         ```
 
    - Gradle/Kotlin
 
         ```kotlin
-        implementation("io.milvus:milvus-sdk-java:2.6.3")
+        implementation("io.milvus:milvus-sdk-java:2.6.4")
         ```
   
 From v2.5.2, milvus Java SDK is split into two packages: milvus-sdk-java and milvus-sdk-java-bulkwriter, because BulkWriter requires quite a lot of dependencies. If you don't need BulkWriter tool, you can ignore the milvus-sdk-java-bulkwriter package.
@@ -59,20 +59,20 @@ To use BulkWriter, import milvus-sdk-java-bulkwriter to your project.
      <dependency>
          <groupId>io.milvus</groupId>
          <artifactId>milvus-sdk-java-bulkwriter</artifactId>
-         <version>2.6.3</version>
+         <version>2.6.4</version>
      </dependency>
     ```
 
    - Gradle/Groovy
 
      ```groovy
-     implementation 'io.milvus:milvus-sdk-java-bulkwriter:2.6.3'
+     implementation 'io.milvus:milvus-sdk-java-bulkwriter:2.6.4'
      ```
 
    - Gradle/Kotlin
 
      ```kotlin
-     implementation("io.milvus:milvus-sdk-java-bulkwriter:2.6.3")
+     implementation("io.milvus:milvus-sdk-java-bulkwriter:2.6.4")
      ```     
 
 ### Examples
diff --git a/examples/pom.xml b/examples/pom.xml
index 02880b4f1..484fd0da0 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -42,7 +42,7 @@
     </build>
 
     <properties>
-        <revision>2.6.3</revision>
+        <revision>2.6.4</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
diff --git a/pom.xml b/pom.xml
index 51d855786..9f9688d72 100644
--- a/pom.xml
+++ b/pom.xml
@@ -82,7 +82,7 @@
     </repositories>
 
     <properties>
-        <revision>2.6.3</revision>
+        <revision>2.6.4</revision>
         <maven.compiler.source>8</maven.compiler.source>
         <maven.compiler.target>8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>