diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/msgaudit/WxCpChatModel.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/msgaudit/WxCpChatModel.java
index 8a9d2130d..c88cb7b9b 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/msgaudit/WxCpChatModel.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/msgaudit/WxCpChatModel.java
@@ -603,7 +603,7 @@ public class WxCpChatModel implements Serializable {
     private String sdkFileId;
 
     @SerializedName("filesize")
-    private Integer fileSize;
+    private Long fileSize;
 
     /**
      * From json file.