diff --git a/README.md b/README.md
index 4acddbc..f2a2243 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ release：编译好的dll。
 3.接口的url为http://127.0.0.1:19088，注入成功后，直接进行调用即可。
 4.特别注意数据库查询接口需要先调用获取到句柄之后，才能进行查询。
 5.相关功能只在win11环境下进行简单测试，其他环境无法保证。
+6.注意个别接口在3.8.0.41版本没有实现，具体参考源码。
 
 #### 编译环境
 
@@ -73,7 +74,9 @@ vcpkg
 
 2022-12-29 ： 新增提取文字功能。  
 
-2022-01-02 ： 退出微信登录。
+2022-01-02 ： 退出微信登录。  
+
+2022-01-31 ： 新增修改群昵称（仅支持3.8.1.26）。
 ### 接口文档：
 
 #### 0.检查微信登录**
@@ -499,6 +502,43 @@ vcpkg
 ```
 
 
+#### 31.修改自身群昵称**
+###### 接口功能
+> 增加群成员
+
+###### 接口地址
+> [/api/?type=31](/api/?type=31)
+
+###### HTTP请求方式
+> POST  JSON
+
+###### 请求参数
+|参数|必选|类型|说明|
+|---|---|---|---|
+|chatRoomId |ture |string| 群id |
+|wxid |ture |string| 自己的id，只能修改自己的群名片 |
+|nickName |ture |string| 修改的昵称 |
+
+###### 返回字段
+|返回字段|字段类型|说明                              |
+|---|---|---|
+|code|int|返回状态,1成功, 0失败|
+|result|string|成功提示|
+
+
+###### 接口示例
+入参：
+``` javascript
+{
+    "chatRoomId":"34932563384@chatroom",
+    "wxid":"wxid_272211111121112",
+    "nickName":"昵称test"
+}
+```
+响应：
+``` javascript
+{"code":1,"result":"OK"}
+```
 
 
 
diff --git a/release/3.8.1.26/wxhelper.dll b/release/3.8.1.26/wxhelper.dll
deleted file mode 100644
index 351ce6a..0000000
Binary files a/release/3.8.1.26/wxhelper.dll and /dev/null differ
diff --git a/src/api.cc b/src/api.cc
index 2235262..ea21fcf 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -381,6 +381,12 @@ void api_handle(mg_http_message *hm, struct mg_connection *c, string &ret) {
       break;
     }
     case WECHAT_CHATROOM_SET_SELF_NICKNAME: {
+      wstring room_id = get_http_req_param(hm, j_param, "chatRoomId", is_post);
+      wstring wxid = get_http_req_param(hm, j_param, "wxid", is_post);
+      wstring nick = get_http_req_param(hm, j_param, "nickName", is_post);
+      int success = ModChatRoomMemberNickName(WS2LW(room_id),WS2LW(wxid),WS2LW(nick));
+      json ret_data = {{"code", success}, {"result", "OK"}};
+      ret = ret_data.dump();
       break;
     }
     case WECHAT_DATABASE_GET_HANDLES: {
diff --git a/src/chat_room.cc b/src/chat_room.cc
index 52662e9..162da51 100644
--- a/src/chat_room.cc
+++ b/src/chat_room.cc
@@ -15,6 +15,7 @@
 #define WX_GET_MEMBER_FROM_CHAT_ROOM_OFFSET 0xa749b0
 #define WX_INIT_CHAT_ROOM_OFFSET 0xd04d80
 #define WX_FREE_CHAT_ROOM_OFFSET 0xa7c620
+#define WX_MOD_CHAT_ROOM_MEMBER_NICK_NAME_OFFSET 0xa6f8f0
 
 int GetChatRoomDetailInfo(wchar_t* chat_room_id, ChatRoomInfoInner& room_info) {
   int success = 0;
@@ -182,3 +183,38 @@ int GetMemberFromChatRoom(wchar_t* chat_room_id,ChatRoomInner & out){
   }  
   return success;
 }
+
+int ModChatRoomMemberNickName(wchar_t* chat_room_id,wchar_t* wxid,wchar_t * nick){
+  int success = 0;
+  WeChatString chat_room(chat_room_id);
+  WeChatString self_wxid(wxid);
+  WeChatString new_nick(nick);
+  DWORD base = GetWeChatWinBase();
+  DWORD get_chat_room_mgr_addr = base + WX_CHAT_ROOM_MGR_OFFSET;
+  DWORD mod_member_nick_name_addr = base + WX_MOD_CHAT_ROOM_MEMBER_NICK_NAME_OFFSET;
+  DWORD init_chat_msg_addr = base + WX_INIT_CHAT_MSG_OFFSET;
+  __asm{
+    PUSHAD
+    CALL       get_chat_room_mgr_addr                               
+    SUB        ESP,0x14
+    MOV        ECX,ESP
+    LEA        EDI,new_nick
+    PUSH       EDI
+    CALL       init_chat_msg_addr                                      
+    SUB        ESP,0x14
+    LEA        EAX,self_wxid
+    MOV        ECX,ESP
+    PUSH       EAX
+    CALL       init_chat_msg_addr                                      
+    SUB        ESP,0x14
+    LEA        EAX,chat_room
+    MOV        ECX,ESP
+    PUSH       EAX
+    CALL       init_chat_msg_addr                                      
+    CALL       mod_member_nick_name_addr   
+    MOVZX     EAX,AL
+    MOV       success,EAX      
+    POPAD
+  }
+  return success;
+}
\ No newline at end of file
diff --git a/src/chat_room.h b/src/chat_room.h
index 9ac930a..4987a2d 100644
--- a/src/chat_room.h
+++ b/src/chat_room.h
@@ -7,4 +7,5 @@ int DelMemberFromChatRoom(wchar_t* chat_room_id,wchar_t** wxids,int len);
 int AddMemberToChatRoom(wchar_t* chat_room_id, wchar_t** wxids,int len);
 
 int GetMemberFromChatRoom(wchar_t* chat_room_id,ChatRoomInner & out);
+int ModChatRoomMemberNickName(wchar_t* chat_room_id,wchar_t* wxid,wchar_t * nick);
 #endif
\ No newline at end of file