diff --git a/f8/jsonhttprequest.cc b/f8/jsonhttprequest.cc
index 1296a50..88b9694 100644
--- a/f8/jsonhttprequest.cc
+++ b/f8/jsonhttprequest.cc
@@ -8,14 +8,14 @@
 
 namespace f8
 {
+
     JsonHttpRequest::JsonHttpRequest()
     {
-        resp_xobj = a8::MutableXObject::NewObject();
+        resp_xobj = a8::MutableXObject::CreateObject();
     }
 
     JsonHttpRequest::~JsonHttpRequest()
     {
-        delete resp_xobj;
         if (context && free_context)  {
             free_context(context);
         }
diff --git a/f8/jsonhttprequest.h b/f8/jsonhttprequest.h
index 3e4c017..59a77de 100644
--- a/f8/jsonhttprequest.h
+++ b/f8/jsonhttprequest.h
@@ -17,7 +17,7 @@ namespace f8
         time_t handle_time = 0;
         std::string query_str;
         a8::XObject request;
-        a8::MutableXObject* resp_xobj = nullptr;
+        std::shared_ptr<a8::MutableXObject> resp_xobj;
 
         int async_pending_count = 0;
         void* context = nullptr;
diff --git a/f8/tglog.cc b/f8/tglog.cc
index fc549fc..46d7aa0 100644
--- a/f8/tglog.cc
+++ b/f8/tglog.cc
@@ -205,7 +205,7 @@ namespace f8
             strftime(buff, a8::ArraySize(buff), "%F %T", &tm_time);
             logtime_str.append((char*)buff);
         }
-        a8::MutableXObject* xobj = a8::MutableXObject::NewObject();
+        auto xobj = a8::MutableXObject::CreateObject();
 
         xobj->SetVal("#account_id", accountid);
         xobj->SetVal("#type", "track");
@@ -232,8 +232,6 @@ namespace f8
                 impl_->save_cond->notify_all();
             }
         }
-        delete xobj;
-        xobj = nullptr;
     }
 
 }