diff --git a/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar b/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar
index 00168ec..d7f72a8 100644
Binary files a/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar and b/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar differ
diff --git a/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java b/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
index 907b66a..5cd509d 100644
--- a/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
+++ b/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
@@ -23,6 +23,7 @@ package com.farsunset.cim.model;
 
 
 import java.io.Serializable;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -35,7 +36,7 @@ public class SentBody implements Serializable {
 
 	private String key;
 
-	private Map<String, String> data;
+	private final Map<String, String> data = new HashMap<>();
 
 	private long timestamp;
 
@@ -44,7 +45,8 @@ public class SentBody implements Serializable {
 	}
 
 	public void setData(Map<String, String> data) {
-		this.data = data;
+		this.data.clear();
+		this.data.putAll(data);
 	}
 
 	public String getKey() {