diff --git a/CHANGELOG.md b/CHANGELOG.md
index 214ed185..31f7b8fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 ### 2.3.0
 module_2 support.  
 
+add a new RdbVisitor : `ValueIterableRdbVisitor`  
+
 **api changes** :  
 
 ```java  
diff --git a/README.md b/README.md
index df15e241..0c238e41 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ Table of Contents([中文说明](./README.zh_CN.md))
       * [2.1. Requirements](#21-requirements)
       * [2.2. Maven dependency](#22-maven-dependency)
       * [2.3. Install from source code](#23-install-from-source-code)
+      * [2.4. Select a version](#24-select-a-version)
    * [3. Simple usage](#3-simple-usage)
       * [3.1. Replication via socket](#31-replication-via-socket)
       * [3.2. Read rdb file](#32-read-rdb-file)
@@ -93,6 +94,15 @@ redis 2.4 - 4.0
     $mvn clean install package -Dmaven.test.skip=true
 ```  
 
+## 2.4. Select a version
+
+|     **redis version**        |**redis-replicator version**  |  
+| ---------------------------- | ---------------------------- |  
+|  \[2.4, 4.0.0\]              |           \[2.3.0\]          |  
+|  \[2.4, 4.0-RC3\]            |       \[2.1.0, 2.2.0\]       |  
+|  \[2.4, 3.2.x\]              |  \[1.0.18\](not supported)   |  
+
+
 # 3. Simple usage  
   
 ## 3.1. Replication via socket  
diff --git a/README.zh_CN.md b/README.zh_CN.md
index dcbcc546..515ad10e 100644
--- a/README.zh_CN.md
+++ b/README.zh_CN.md
@@ -98,6 +98,15 @@ redis 2.4 - 4.0
     $mvn clean install package -Dmaven.test.skip=true
 ```  
 
+## 2.4. 选择一个版本
+
+|     **redis 版本**        |**redis-replicator 版本**  |  
+| ------------------------- | ------------------------- |  
+|  \[2.4, 4.0.0\]           |           \[2.3.0\]       |  
+|  \[2.4, 4.0-RC3\]         |       \[2.1.0, 2.2.0\]    |  
+|  \[2.4, 3.2.x\]           |  \[1.0.18\](不再提供支持)  |  
+
+
 # 3. 简要用法  
   
 ## 3.1. 通过socket同步