diff --git a/README.md b/README.md
index 91667959..c4cebbd8 100755
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/an-tao/drogon.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/an-tao/drogon/alerts/)
 [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/an-tao/drogon.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/an-tao/drogon/context:cpp)
 
-**Drogon** is a C++11-based HTTP application framework. Drogon can be used to easily build various types of web application server programs using C++. **Drogon** is the name of a dragon in the American TV series "Game of Thrones" that I really like. 
+**Drogon** is a C++14/17-based HTTP application framework. Drogon can be used to easily build various types of web application server programs using C++. **Drogon** is the name of a dragon in the American TV series "Game of Thrones" that I really like. 
 
 Drogon's main application platform is Linux. It also supports Mac OS and FreeBSD. Currently it does not support windows. Its main features are as follows:
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index e3c65834..22d2f8ab 100755
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -5,7 +5,7 @@
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/an-tao/drogon.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/an-tao/drogon/alerts/)
 [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/an-tao/drogon.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/an-tao/drogon/context:cpp)
 
-**Drogon**是一个基于C++11的Http应用框架，使用Drogon可以方便的使用C++构建各种类型的Web应用服务端程序。
+**Drogon**是一个基于C++14/17的Http应用框架，使用Drogon可以方便的使用C++构建各种类型的Web应用服务端程序。
 本版本库是github上[Drogon工程](https://github.com/an-tao/drogon)的镜像库。**Drogon**是作者非常喜欢的美剧《权力的游戏》中的一条龙的名字(汉译作卓耿)，和龙有关但并不是dragon的误写，为了不至于引起不必要的误会这里说明一下。
 
 Drogon的主要应用平台是Linux，也支持Mac OS、FreeBSD，目前还不支持Windows。它的主要特点如下：
diff --git a/lib/inc/drogon/drogon.h b/lib/inc/drogon/drogon.h
index 43280a2d..fc55cc57 100644
--- a/lib/inc/drogon/drogon.h
+++ b/lib/inc/drogon/drogon.h
@@ -12,8 +12,7 @@
  *
  */
 
-#ifndef __HEADER_DROGON_H__
-#define __HEADER_DROGON_H__
+#pragma once
 
 #include <drogon/config.h>
 
@@ -27,6 +26,4 @@
 #include <drogon/HttpSimpleController.h>
 #include <drogon/CacheMap.h>
 #include <drogon/HttpClient.h>
-#include <drogon/utils/Utilities.h>
-
-#endif
+#include <drogon/utils/Utilities.h>
\ No newline at end of file
diff --git a/lib/src/HttpAppFrameworkImpl.cc b/lib/src/HttpAppFrameworkImpl.cc
index a7c2b225..4aa00bae 100755
--- a/lib/src/HttpAppFrameworkImpl.cc
+++ b/lib/src/HttpAppFrameworkImpl.cc
@@ -318,7 +318,7 @@ void HttpAppFrameworkImpl::run()
             ioLoops.push_back(serverPtr->getLoop());
         }
 #else
-        auto loopThreadPtr = std::make_shared<EventLoopThread>("DrogonIoLoop");
+        auto loopThreadPtr = std::make_shared<EventLoopThread>("DrogonListeningLoop");
         loopThreadPtr->run();
         loopThreads.push_back(loopThreadPtr);
         auto serverPtr = std::make_shared<HttpServer>(loopThreadPtr->getLoop(),
@@ -349,6 +349,7 @@ void HttpAppFrameworkImpl::run()
         serverPtr->setConnectionCallback(std::bind(&HttpAppFrameworkImpl::onConnection, this, _1));
         serverPtr->kickoffIdleConnections(_idleConnectionTimeout);
         serverPtr->start();
+        /// Use std::promise to ensure that IO loops have been created
         std::promise<int> pro;
         auto f = pro.get_future();
         serverPtr->getLoop()->runInLoop([&pro]() {