diff --git a/CMakeLists.txt b/CMakeLists.txt
index aebd708..291162b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ project(wxhelper VERSION 1.0.0)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D '_UNICODE' /D 'UNICODE'")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D '_UNICODE' /D 'UNICODE' /D 'ELPP_THREAD_SAFE'")
 
 file(GLOB CPP_FILES  ${PROJECT_SOURCE_DIR}/src/*.cc  ${PROJECT_SOURCE_DIR}/src/*.cpp)
 
diff --git a/src/contact_mgr.cc b/src/contact_mgr.cc
index 9525e41..e0bd40b 100644
--- a/src/contact_mgr.cc
+++ b/src/contact_mgr.cc
@@ -175,7 +175,7 @@ int ContactMgr::AddFriendByWxid(wchar_t *wxid,wchar_t* msg) {
   return success;
 }
 
- int ContactMgr::VerifyApply(wchar_t *v3, wchar_t *v4){
+ int ContactMgr::VerifyApply(wchar_t *v3, wchar_t *v4,int permission){
   int success = -1;
   DWORD set_value_addr = base_addr_ + WX_INIT_CHAT_MSG_OFFSET;
   DWORD verify_addr = base_addr_ + WX_VERIFY_OK_OFFSET;
@@ -186,12 +186,13 @@ int ContactMgr::AddFriendByWxid(wchar_t *wxid,wchar_t* msg) {
   WeChatString v3_str(v3);
   char helper_obj[0x40] = {0};
   char nullbuffer[0x3CC] = {0};
+  int flag = permission < 0 ? 0:permission;
   __asm {
       PUSHAD  
       PUSHFD         
       LEA        ECX,helper_obj
       CALL       new_helper_addr
-      MOV        ESI,0x0
+      MOV        ESI,flag
       MOV        EDI,0x6                   
       PUSH       ESI
       PUSH       EDI
diff --git a/src/contact_mgr.h b/src/contact_mgr.h
index 677d564..24de50b 100644
--- a/src/contact_mgr.h
+++ b/src/contact_mgr.h
@@ -14,7 +14,7 @@ class ContactMgr : public BaseMgr {
   int DelContact(wchar_t* wxid);
   std::wstring GetContactOrChatRoomNickname(wchar_t* id);
   int AddFriendByWxid(wchar_t* wxid,wchar_t* msg);
-  int VerifyApply(wchar_t *v3, wchar_t *v4);
+  int VerifyApply(wchar_t *v3, wchar_t *v4,int permission);
 };
 }  // namespace wxhelper
 
diff --git a/src/http_handler.cc b/src/http_handler.cc
index 8450ca6..acd1f5a 100644
--- a/src/http_handler.cc
+++ b/src/http_handler.cc
@@ -252,7 +252,8 @@ string Dispatch(struct mg_connection *c, struct mg_http_message *hm) {
     case WECHAT_CONTACT_VERIFY_APPLY: {
       wstring v3 = GetWStringParam(j_param, "v3");
       wstring v4 = GetWStringParam(j_param, "v4");
-      int success = g_context.contact_mgr->VerifyApply(WS2LPWS(v3),WS2LPWS(v4));
+      int permission = GetIntParam(j_param, "permission");
+      int success = g_context.contact_mgr->VerifyApply(WS2LPWS(v3),WS2LPWS(v4),permission);
       json ret_data = {{"code", success}, {"result", "OK"}};
       ret = ret_data.dump();
       break;