diff --git a/cocos/base/CCUserDefault.cpp b/cocos/base/CCUserDefault.cpp
index e78078ea70..394fd5ca67 100644
--- a/cocos/base/CCUserDefault.cpp
+++ b/cocos/base/CCUserDefault.cpp
@@ -297,8 +297,7 @@ void UserDefault::setStringForKey(const char* pKey, const std::string & value)
         if ((_realSize + obs.length() + sizeof(udflen_t)) < _curMapSize)
         {
             // increase entities count
-            auto count = yasio::endian::ntohv(*(udflen_t*)_rwmmap->data());
-            *(udflen_t*)_rwmmap->data() = yasio::endian::htonv(count + 1);
+            yasio::obstream::swrite_i(_rwmmap->data(), 1 + yasio::ibstream::sread_i<udflen_t>(_rwmmap->data()));
 
             // append entity
             ::memcpy(_rwmmap->data() + sizeof(udflen_t) + _realSize, obs.data(), obs.length());
diff --git a/external/config.json b/external/config.json
index 366f3474fd..9d2c2d0eda 100644
--- a/external/config.json
+++ b/external/config.json
@@ -1,5 +1,5 @@
 {
-    "version": "v28",
+    "version": "v29",
     "zip_file_size": "107642814",
     "repo_name": "engine-v5-3rd",
     "repo_parent": "https://github.com/c4games/",