diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpChat.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpChat.java
index 1f593e474..03b9aaa7d 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpChat.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpChat.java
@@ -1,5 +1,6 @@
 package me.chanjar.weixin.cp.bean;
 
+import java.io.Serializable;
 import java.util.List;
 
 import lombok.Data;
@@ -10,7 +11,8 @@ import lombok.Data;
  * @author gaigeshen
  */
 @Data
-public class WxCpChat {
+public class WxCpChat implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
   
   private String id;
   private String name;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpOauth2UserInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpOauth2UserInfo.java
index 90e6142b3..56e65b900 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpOauth2UserInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpOauth2UserInfo.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean;
 
+import java.io.Serializable;
+
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
@@ -19,7 +21,9 @@ import lombok.experimental.Accessors;
 @NoArgsConstructor
 @AllArgsConstructor
 @Builder
-public class WxCpOauth2UserInfo {
+public class WxCpOauth2UserInfo implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   private String openId;
   private String deviceId;
   private String userId;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpProviderToken.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpProviderToken.java
index 2c98f8e3f..6a33f1c48 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpProviderToken.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpProviderToken.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean;
 
+import java.io.Serializable;
+
 import com.google.gson.annotations.SerializedName;
 import lombok.Data;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
@@ -11,7 +13,8 @@ import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
  * @date 2019-11-02
  */
 @Data
-public class WxCpProviderToken {
+public class WxCpProviderToken implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
   /**
    * 服务商的access_token，最长为512字节。
    */
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAdmin.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAdmin.java
index 4500531ae..2aa89d215 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAdmin.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAdmin.java
@@ -23,7 +23,8 @@ public class WxCpTpAdmin extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class Admin {
+  public static class Admin extends WxCpBaseResp {
+    private static final long serialVersionUID = -5028321625140879571L;
 
     @SerializedName("userid")
     private String userId;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAuthInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAuthInfo.java
index 4354865a2..02d51095c 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAuthInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpAuthInfo.java
@@ -5,6 +5,7 @@ import lombok.Getter;
 import lombok.Setter;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -37,7 +38,9 @@ public class WxCpTpAuthInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class DealerCorpInfo {
+  public static class DealerCorpInfo extends WxCpBaseResp {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("corpid")
     private String corpId;
 
@@ -47,7 +50,9 @@ public class WxCpTpAuthInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class AuthCorpInfo {
+  public static class AuthCorpInfo implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("corpid")
     private String corpId;
 
@@ -112,7 +117,8 @@ public class WxCpTpAuthInfo extends WxCpBaseResp {
    */
   @Getter
   @Setter
-  public static class AuthInfo {
+  public static class AuthInfo implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
 
     /**
      * 授权的应用信息，注意是一个数组，但仅旧的多应用套件授权时会返回多个agent，对新的单应用授权，永远只返回一个agent
@@ -124,7 +130,9 @@ public class WxCpTpAuthInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class Agent {
+  public static class Agent implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("agentid")
     private Integer agentId;
 
@@ -157,7 +165,8 @@ public class WxCpTpAuthInfo extends WxCpBaseResp {
    */
   @Getter
   @Setter
-  public static class Privilege {
+  public static class Privilege implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
 
     /**
      * 权限等级。
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearch.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearch.java
index 00fce5140..ee1de69f5 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearch.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearch.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean;
 
+import java.io.Serializable;
+
 import com.google.gson.annotations.SerializedName;
 import lombok.Data;
 import lombok.experimental.Accessors;
@@ -12,7 +14,8 @@ import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
  */
 @Data
 @Accessors(chain = true)
-public class WxCpTpContactSearch {
+public class WxCpTpContactSearch implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
 
     /**
      * 查询的企业corpid
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearchResp.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearchResp.java
index 959a55f9c..1998a4230 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearchResp.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpContactSearchResp.java
@@ -5,6 +5,7 @@ import lombok.Data;
 import lombok.EqualsAndHashCode;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -23,7 +24,8 @@ public class WxCpTpContactSearchResp extends WxCpBaseResp {
     private QueryResult queryResult;
 
     @Data
-    public static class QueryResult {
+    public static class QueryResult implements Serializable {
+        private static final long serialVersionUID = -4301684507150486556L;
 
         @SerializedName("user")
         private User user;
@@ -31,7 +33,8 @@ public class WxCpTpContactSearchResp extends WxCpBaseResp {
         private Party party;
 
         @Data
-        public static class User {
+        public static class User implements Serializable {
+            private static final long serialVersionUID = -4301684507150486556L;
             @SerializedName("userid")
             private List<String> userid;
             @SerializedName("open_userid")
@@ -39,7 +42,9 @@ public class WxCpTpContactSearchResp extends WxCpBaseResp {
         }
 
         @Data
-        public static class Party {
+        public static class Party implements Serializable {
+            private static final long serialVersionUID = -4301684507150486556L;
+
             @SerializedName("department_id")
             private List<Integer> departmentId;
         }
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpPermanentCodeInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpPermanentCodeInfo.java
index cd57119d1..02793de14 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpPermanentCodeInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpTpPermanentCodeInfo.java
@@ -5,6 +5,7 @@ import lombok.Getter;
 import lombok.Setter;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -48,7 +49,9 @@ public class WxCpTpPermanentCodeInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class AuthCorpInfo {
+  public static class AuthCorpInfo implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("corpid")
     private String corpId;
 
@@ -113,7 +116,8 @@ public class WxCpTpPermanentCodeInfo extends WxCpBaseResp {
    */
   @Getter
   @Setter
-  public static class AuthInfo {
+  public static class AuthInfo implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
 
     /**
      * 授权的应用信息，注意是一个数组，但仅旧的多应用套件授权时会返回多个agent，对新的单应用授权，永远只返回一个agent
@@ -125,7 +129,9 @@ public class WxCpTpPermanentCodeInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class Agent {
+  public static class Agent implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("agentid")
     private Integer agentId;
 
@@ -158,7 +164,9 @@ public class WxCpTpPermanentCodeInfo extends WxCpBaseResp {
    */
   @Getter
   @Setter
-  public static class AuthUserInfo {
+  public static class AuthUserInfo implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
+
     @SerializedName("userid")
     private String userId;
 
@@ -174,7 +182,8 @@ public class WxCpTpPermanentCodeInfo extends WxCpBaseResp {
    */
   @Getter
   @Setter
-  public static class Privilege {
+  public static class Privilege implements Serializable {
+    private static final long serialVersionUID = -5028321625140879571L;
 
     /**
      * 权限等级。
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUser.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUser.java
index 2cda7fde5..a23b49948 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUser.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUser.java
@@ -94,7 +94,9 @@ public class WxCpUser implements Serializable {
   @Builder
   @NoArgsConstructor
   @AllArgsConstructor
-  public static class Attr {
+  public static class Attr implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+
     /**
      * 属性类型: 0-文本 1-网页
      */
@@ -109,7 +111,9 @@ public class WxCpUser implements Serializable {
   @Builder
   @NoArgsConstructor
   @AllArgsConstructor
-  public static class ExternalAttribute {
+  public static class ExternalAttribute implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+    
     /**
      * 属性类型: 0-本文 1-网页 2-小程序.
      */
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserDetail.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserDetail.java
index 1d40e94ae..7c4af4df6 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserDetail.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserDetail.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean;
 
+import java.io.Serializable;
+
 import com.google.gson.annotations.SerializedName;
 import lombok.Data;
 
@@ -12,7 +14,8 @@ import lombok.Data;
  * @author <a href="https://github.com/binarywang">Binary Wang</a>
  */
 @Data
-public class WxCpUserDetail {
+public class WxCpUserDetail implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
 
   /**
    * 成员UserID
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserExternalContactInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserExternalContactInfo.java
index e9a8d5907..6a9e2c8e7 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserExternalContactInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/WxCpUserExternalContactInfo.java
@@ -4,6 +4,7 @@ import com.google.gson.annotations.SerializedName;
 import lombok.*;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -17,7 +18,9 @@ import java.util.List;
  */
 @Getter
 @Setter
-public class WxCpUserExternalContactInfo {
+public class WxCpUserExternalContactInfo implements Serializable {
+  private static final long serialVersionUID = -5696099236344075582L;
+
   @SerializedName("external_contact")
   private ExternalContact externalContact;
 
@@ -26,7 +29,9 @@ public class WxCpUserExternalContactInfo {
 
   @Getter
   @Setter
-  public static class ExternalContact {
+  public static class ExternalContact implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+
     @SerializedName("external_userid")
     private String externalUserId;
 
@@ -60,7 +65,9 @@ public class WxCpUserExternalContactInfo {
 
   @Setter
   @Getter
-  public static class ExternalProfile {
+  public static class ExternalProfile implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+
     @SerializedName("external_attr")
     private List<ExternalAttribute> externalAttrs;
   }
@@ -69,23 +76,30 @@ public class WxCpUserExternalContactInfo {
   @Builder
   @NoArgsConstructor
   @AllArgsConstructor
-  public static class ExternalAttribute {
+  public static class ExternalAttribute implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
     @Setter
     @Getter
-    public static class Text {
+    public static class Text implements Serializable {
+      private static final long serialVersionUID = -5696099236344075582L;
+
       private String value;
     }
 
     @Setter
     @Getter
-    public static class Web {
+    public static class Web implements Serializable {
+      private static final long serialVersionUID = -5696099236344075582L;
+
       private String title;
       private String url;
     }
 
     @Setter
     @Getter
-    public static class MiniProgram {
+    public static class MiniProgram implements Serializable {
+      private static final long serialVersionUID = -5696099236344075582L;
+
       @SerializedName("pagepath")
       private String pagePath;
       private String appid;
@@ -106,7 +120,9 @@ public class WxCpUserExternalContactInfo {
 
   @Setter
   @Getter
-  public static class FollowedUser {
+  public static class FollowedUser implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+    
     @SerializedName("userid")
     private String userId;
     private String remark;
@@ -132,7 +148,9 @@ public class WxCpUserExternalContactInfo {
 
   @Setter
   @Getter
-  public static class Tag {
+  public static class Tag implements Serializable {
+    private static final long serialVersionUID = -5696099236344075582L;
+
     @SerializedName("group_name")
     private String groupName;
     @SerializedName("tag_name")
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpContactWayInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpContactWayInfo.java
index 21c2696b6..ca3156f77 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpContactWayInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpContactWayInfo.java
@@ -9,6 +9,7 @@ import lombok.Setter;
 import me.chanjar.weixin.cp.util.json.WxCpConclusionAdapter;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -18,14 +19,17 @@ import java.util.List;
  */
 @Data
 @NoArgsConstructor
-public class WxCpContactWayInfo {
+public class WxCpContactWayInfo implements Serializable {
+  private static final long serialVersionUID = -8697184659526210472L;
 
   @SerializedName("contact_way")
   private ContactWay contactWay;
 
   @Getter
   @Setter
-  public static class ContactWay {
+  public static class ContactWay implements Serializable {
+    private static final long serialVersionUID = -8697184659526210472L;
+
     /**
      * 联系方式的配置id
      */
@@ -166,7 +170,9 @@ public class WxCpContactWayInfo {
      */
     @Data
     @JsonAdapter(WxCpConclusionAdapter.class)
-    public static class Conclusion {
+    public static class Conclusion implements Serializable {
+      private static final long serialVersionUID = -8697184659526210472L;
+      
       private String textContent;
       private String imgMediaId;
       private String imgPicUrl;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalContactList.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalContactList.java
index 1320e3894..f0cccabe6 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalContactList.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalContactList.java
@@ -4,6 +4,7 @@ import com.google.gson.annotations.Expose;
 import com.google.gson.annotations.SerializedName;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -15,7 +16,9 @@ import java.util.List;
  *
  * @author <a href="https://github.com/JoeCao">Joe Cao</a>
  */
-public class WxCpUserExternalContactList {
+public class WxCpUserExternalContactList implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   @SerializedName("errcode")
   @Expose
   private Long errcode;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatInfo.java
index 83eb5c376..fdf144f80 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatInfo.java
@@ -6,6 +6,7 @@ import lombok.Setter;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -21,7 +22,9 @@ public class WxCpUserExternalGroupChatInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class GroupChat {
+  public static class GroupChat implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
+    
     @SerializedName("chat_id")
     private String chatId;
 
@@ -44,7 +47,9 @@ public class WxCpUserExternalGroupChatInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class GroupMember {
+  public static class GroupMember implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
+
     @SerializedName("userid")
     private String userId;
 
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatList.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatList.java
index 8215377e4..07ac8f69d 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatList.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatList.java
@@ -6,6 +6,7 @@ import lombok.Setter;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -21,7 +22,7 @@ public class WxCpUserExternalGroupChatList extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class ChatStatus {
+  public static class ChatStatus implements Serializable {
 
     /**
      * 客户群ID
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatStatistic.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatStatistic.java
index dd5756532..472f1a164 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatStatistic.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalGroupChatStatistic.java
@@ -17,7 +17,7 @@ import java.util.List;
  */
 @Getter
 @Setter
-public class WxCpUserExternalGroupChatStatistic extends WxCpBaseResp implements Serializable {
+public class WxCpUserExternalGroupChatStatistic extends WxCpBaseResp {
   private static final long serialVersionUID = -3548998672207956622L;
 
   @SerializedName("total")
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupInfo.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupInfo.java
index 97ff3f257..bf1ec0f0f 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupInfo.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupInfo.java
@@ -7,6 +7,7 @@ import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -21,7 +22,8 @@ public class WxCpUserExternalTagGroupInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class TagGroup {
+  public static class TagGroup implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
 
     @SerializedName("group_id")
     private String groupId;
@@ -48,7 +50,8 @@ public class WxCpUserExternalTagGroupInfo extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class Tag {
+  public static class Tag implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
 
     /**
      * 客户群ID
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupList.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupList.java
index bb1556516..4ee913a24 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupList.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalTagGroupList.java
@@ -7,6 +7,7 @@ import me.chanjar.weixin.common.util.json.WxGsonBuilder;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -21,7 +22,9 @@ public class WxCpUserExternalTagGroupList extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class TagGroup{
+  public static class TagGroup implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
+
     @SerializedName("group_id")
     private String groupId;
 
@@ -43,7 +46,8 @@ public class WxCpUserExternalTagGroupList extends WxCpBaseResp {
 
     @Getter
     @Setter
-    public static class Tag {
+    public static class Tag implements Serializable {
+      private static final long serialVersionUID = -4301684507150486556L;
 
       /**
        * 客户群ID
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUnassignList.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUnassignList.java
index 2870eb15b..10d2b2ade 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUnassignList.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUnassignList.java
@@ -6,6 +6,7 @@ import lombok.Setter;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -25,7 +26,8 @@ public class WxCpUserExternalUnassignList extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class UnassignInfo {
+  public static class UnassignInfo implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
 
     /**
      * 离职成员userid
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUserBehaviorStatistic.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUserBehaviorStatistic.java
index 48fcbcba3..b05a29bb2 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUserBehaviorStatistic.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserExternalUserBehaviorStatistic.java
@@ -6,6 +6,7 @@ import lombok.Setter;
 import me.chanjar.weixin.cp.bean.WxCpBaseResp;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -22,7 +23,8 @@ public class WxCpUserExternalUserBehaviorStatistic extends WxCpBaseResp {
 
   @Getter
   @Setter
-  public static class Behavior {
+  public static class Behavior implements Serializable {
+    private static final long serialVersionUID = -4301684507150486556L;
 
     /**
      * 数据日期，为当日0点的时间戳
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserWithExternalPermission.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserWithExternalPermission.java
index 3a5c366d7..3cd21ea19 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserWithExternalPermission.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/WxCpUserWithExternalPermission.java
@@ -5,13 +5,16 @@ import com.google.gson.annotations.SerializedName;
 import lombok.Data;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author 曹祖鹏
  */
 @Data
-public class WxCpUserWithExternalPermission {
+public class WxCpUserWithExternalPermission implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   @SerializedName("errcode")
   @Expose
   private Long errCode;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/contact/FollowedUser.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/contact/FollowedUser.java
index a9fb7ba83..6e1973e4a 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/contact/FollowedUser.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/external/contact/FollowedUser.java
@@ -12,7 +12,9 @@ import java.io.Serializable;
  * @date 2020-11-04
  */
 @Data
-public class FollowedUser {
+public class FollowedUser implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   @SerializedName("userid")
   private String userId;
 
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
index c97e5eb16..de7e88d79 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpGroupRobotMessage.java
@@ -8,6 +8,7 @@ import lombok.NoArgsConstructor;
 import lombok.experimental.Accessors;
 import me.chanjar.weixin.cp.bean.article.NewArticle;
 
+import java.io.Serializable;
 import java.util.List;
 
 import static me.chanjar.weixin.cp.constant.WxCpConsts.GroupRobotMsgType.*;
@@ -22,7 +23,9 @@ import static me.chanjar.weixin.cp.constant.WxCpConsts.GroupRobotMsgType.*;
 @NoArgsConstructor
 @Accessors(chain = true)
 @Data
-public class WxCpGroupRobotMessage {
+public class WxCpGroupRobotMessage implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   /**
    * 消息类型
    */
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpMessageSendStatistics.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpMessageSendStatistics.java
index fa14d15e8..7cef0564d 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpMessageSendStatistics.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpMessageSendStatistics.java
@@ -4,6 +4,7 @@ import com.google.gson.annotations.SerializedName;
 import lombok.Data;
 import me.chanjar.weixin.cp.util.json.WxCpGsonBuilder;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -13,7 +14,9 @@ import java.util.List;
  * @date 2020-09-13
  */
 @Data
-public class WxCpMessageSendStatistics {
+public class WxCpMessageSendStatistics implements Serializable {
+  private static final long serialVersionUID = 6031833682211475786L;
+
   public static WxCpMessageSendStatistics fromJson(String json) {
     return WxCpGsonBuilder.create().fromJson(json, WxCpMessageSendStatistics.class);
   }
@@ -21,7 +24,9 @@ public class WxCpMessageSendStatistics {
   private List<StatisticItem> statistics;
 
   @Data
-  public static class StatisticItem {
+  public static class StatisticItem  implements Serializable {
+    private static final long serialVersionUID = 6031833682211475786L;
+    
     /**
      * 应用名
      */
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpTpXmlMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpTpXmlMessage.java
index ef627ac2a..b047ac54c 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpTpXmlMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpTpXmlMessage.java
@@ -283,7 +283,9 @@ public class WxCpTpXmlMessage implements Serializable {
 
   @Data
   @XStreamAlias("ContactSync")
-  public static class ContactSync {
+  public static class ContactSync implements Serializable {
+    private static final long serialVersionUID = 6031833682211475786L;
+
     @XStreamAlias("AccessToken")
     @XStreamConverter(value = XStreamCDataConverter.class)
     protected String accessToken;
@@ -294,7 +296,7 @@ public class WxCpTpXmlMessage implements Serializable {
 
   @Data
   @XStreamAlias("AuthUserInfo")
-  public static class AuthUserInfo {
+  public static class AuthUserInfo implements Serializable {
     @XStreamAlias("UserId")
     @XStreamConverter(value = XStreamCDataConverter.class)
     protected String userId;
@@ -302,7 +304,9 @@ public class WxCpTpXmlMessage implements Serializable {
 
   @Data
   @XStreamAlias("BatchJob")
-  public static class BatchJob {
+  public static class BatchJob implements Serializable {
+    private static final long serialVersionUID = 6031833682211475786L;
+
     @XStreamAlias("JobId")
     @XStreamConverter(value = XStreamCDataConverter.class)
     protected String JobId;
@@ -322,7 +326,9 @@ public class WxCpTpXmlMessage implements Serializable {
 
   @Data
   @XStreamAlias("ApprovalInfo")
-  public static class ApprovalInfo {
+  public static class ApprovalInfo implements Serializable {
+    private static final long serialVersionUID = 6031833682211475786L;
+
     @XStreamAlias("ThirdNo")
     protected Long thirdNo;
 
@@ -365,7 +371,9 @@ public class WxCpTpXmlMessage implements Serializable {
     //2.自建/第三方应用调用审批流程引擎发起申请之后，在“审批中”状态，有任意审批人进行审批操作时
     @Data
     @XStreamAlias("ApprovalNode")
-    public static class ApprovalNode {
+    public static class ApprovalNode implements Serializable {
+      private static final long serialVersionUID = 6031833682211475786L;
+
       @XStreamAlias("NodeStatus")
       protected Integer nodeStatus;
 
@@ -380,7 +388,9 @@ public class WxCpTpXmlMessage implements Serializable {
 
       @Data
       @XStreamAlias("Item")
-      public static class Item {
+      public static class Item implements Serializable {
+        private static final long serialVersionUID = 6031833682211475786L;
+
         @XStreamAlias("ItemName")
         protected String itemName;
         @XStreamAlias("ItemUserId")
@@ -398,7 +408,9 @@ public class WxCpTpXmlMessage implements Serializable {
 
     @Data
     @XStreamAlias("NotifyNode")
-    public static class NotifyNode {
+    public static class NotifyNode implements Serializable {
+      private static final long serialVersionUID = 6031833682211475786L;
+      
       @XStreamAlias("ItemName")
       protected String itemName;
       @XStreamAlias("ItemUserId")
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlMessage.java
index 3a90917d5..b791fffb5 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlMessage.java
@@ -505,7 +505,9 @@ public class WxCpXmlMessage implements Serializable {
 
     @XStreamAlias("Item")
     @Data
-    public static class Item {
+    public static class Item implements Serializable {
+      private static final long serialVersionUID = -3418685294606228837L;
+
       @XStreamAlias("Name")
       @XStreamConverter(value = XStreamCDataConverter.class)
       private String name;
@@ -529,7 +531,9 @@ public class WxCpXmlMessage implements Serializable {
 
     @XStreamAlias("item")
     @Data
-    public static class Item {
+    public static class Item implements Serializable {
+      private static final long serialVersionUID = -6549728838848064881L;
+      
       @XStreamAlias("PicMd5Sum")
       @XStreamConverter(value = XStreamCDataConverter.class)
       private String picMd5Sum;
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutNewsMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutNewsMessage.java
index 87b0ca9de..7b13ccfca 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutNewsMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutNewsMessage.java
@@ -7,6 +7,7 @@ import lombok.EqualsAndHashCode;
 import me.chanjar.weixin.common.api.WxConsts;
 import me.chanjar.weixin.common.util.xml.XStreamCDataConverter;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -34,7 +35,8 @@ public class WxCpXmlOutNewsMessage extends WxCpXmlOutMessage {
 
   @XStreamAlias("item")
   @Data
-  public static class Item {
+  public static class Item implements Serializable {
+    private static final long serialVersionUID = -8672761162722733622L;
 
     @XStreamAlias("Title")
     @XStreamConverter(value = XStreamCDataConverter.class)
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutVideoMessage.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutVideoMessage.java
index c16d682a3..031dc02cb 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutVideoMessage.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/message/WxCpXmlOutVideoMessage.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean.message;
 
+import java.io.Serializable;
+
 import com.thoughtworks.xstream.annotations.XStreamAlias;
 import com.thoughtworks.xstream.annotations.XStreamConverter;
 import lombok.Data;
@@ -46,7 +48,8 @@ public class WxCpXmlOutVideoMessage extends WxCpXmlOutMessage {
 
   @Data
   @XStreamAlias("Video")
-  public static class Video {
+  public static class Video implements Serializable {
+    private static final long serialVersionUID = -8672761162722733622L;
 
     @XStreamAlias("MediaId")
     @XStreamConverter(value = XStreamCDataConverter.class)
diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/taskcard/TaskCardButton.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/taskcard/TaskCardButton.java
index 16182e234..4a7e3c00e 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/taskcard/TaskCardButton.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/taskcard/TaskCardButton.java
@@ -1,5 +1,7 @@
 package me.chanjar.weixin.cp.bean.taskcard;
 
+import java.io.Serializable;
+
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
@@ -18,7 +20,9 @@ import lombok.NoArgsConstructor;
 @Builder
 @NoArgsConstructor
 @AllArgsConstructor
-public class TaskCardButton {
+public class TaskCardButton implements Serializable {
+  private static final long serialVersionUID = -4301684507150486556L;
+  
   private String key;
   private String name;
   private String replaceName;