diff --git a/CMakeLists.txt b/CMakeLists.txt
index fd97aafe..f016fa82 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,11 +155,11 @@ if(NOT WIN32)
     message(FATAL_ERROR "uuid lib error")
   endif()
 endif(NOT WIN32)
-if(NOT MSVC)
+if(NOT MSVC OR NOT BUILD_ORM)
   find_package(ZLIB REQUIRED)
   target_include_directories(${PROJECT_NAME} PRIVATE ${ZLIB_INCLUDE_DIR})
   target_link_libraries(${PROJECT_NAME} PRIVATE ${ZLIB_LIBRARIES})
-endif(NOT MSVC)
+endif(NOT MSVC OR NOT BUILD_ORM)
 
 set(DROGON_SOURCES
     lib/src/AOPAdvice.cc
diff --git a/cmake/templates/DrogonConfig.cmake.in b/cmake/templates/DrogonConfig.cmake.in
index 1d2bacaa..6e35a8cd 100644
--- a/cmake/templates/DrogonConfig.cmake.in
+++ b/cmake/templates/DrogonConfig.cmake.in
@@ -3,15 +3,15 @@
 #  DROGON_INCLUDE_DIRS - include directories for Drogon
 #  DROGON_LIBRARIES    - libraries to link against
 #  DROGON_EXECUTABLE   - the drogon_ctl executable
-#  DROGON_FOUND
+#  Drogon_FOUND
 # This module defines the following IMPORTED target:
 # Drogon::Drogon
 
 @PACKAGE_INIT@
 
-if(NOT TRANTOR_FOUND)
+if(NOT Trantor_FOUND)
 # find trantor
-  find_package(Trantor REQUIRED)
+  find_package(Trantor CONFIG REQUIRED)
 endif()
 
 # Our library dependencies (contains definitions for IMPORTED targets)
@@ -24,4 +24,3 @@ endif()
 get_target_property(DROGON_INCLUDE_DIRS Drogon::Drogon INTERFACE_INCLUDE_DIRECTORIES)
 set(DROGON_LIBRARIES Drogon::Drogon)
 set(DROGON_EXECUTABLE drogon_ctl)
-set(DROGON_FOUND TRUE)
diff --git a/lib/inc/drogon/HttpRequest.h b/lib/inc/drogon/HttpRequest.h
index 70521fca..0afdcbd2 100644
--- a/lib/inc/drogon/HttpRequest.h
+++ b/lib/inc/drogon/HttpRequest.h
@@ -58,11 +58,11 @@ HttpRequestPtr toRequest(T &&)
 }
 
 template <>
-HttpRequestPtr toRequest(const Json::Value &pJson);
+HttpRequestPtr toRequest<const Json::Value &>(const Json::Value &pJson);
 template <>
 HttpRequestPtr toRequest(Json::Value &&pJson);
 template <>
-inline HttpRequestPtr toRequest(Json::Value &pJson)
+inline HttpRequestPtr toRequest<Json::Value &>(Json::Value &pJson)
 {
     return toRequest((const Json::Value &)pJson);
 }
@@ -372,7 +372,7 @@ class HttpRequest
 };
 
 template <>
-inline HttpRequestPtr toRequest(const Json::Value &pJson)
+inline HttpRequestPtr toRequest<const Json::Value &>(const Json::Value &pJson)
 {
     return HttpRequest::newHttpJsonRequest(pJson);
 }
diff --git a/lib/inc/drogon/HttpResponse.h b/lib/inc/drogon/HttpResponse.h
index 694d8139..176621f1 100644
--- a/lib/inc/drogon/HttpResponse.h
+++ b/lib/inc/drogon/HttpResponse.h
@@ -54,11 +54,11 @@ HttpResponsePtr toResponse(T &&)
     exit(1);
 }
 template <>
-HttpResponsePtr toResponse(const Json::Value &pJson);
+HttpResponsePtr toResponse<const Json::Value &>(const Json::Value &pJson);
 template <>
 HttpResponsePtr toResponse(Json::Value &&pJson);
 template <>
-inline HttpResponsePtr toResponse(Json::Value &pJson)
+inline HttpResponsePtr toResponse<Json::Value &>(Json::Value &pJson)
 {
     return toResponse((const Json::Value &)pJson);
 }
@@ -367,7 +367,7 @@ class HttpResponse
     virtual void setBody(const char *body, size_t len) = 0;
 };
 template <>
-inline HttpResponsePtr toResponse(const Json::Value &pJson)
+inline HttpResponsePtr toResponse<const Json::Value &>(const Json::Value &pJson)
 {
     return HttpResponse::newHttpJsonResponse(pJson);
 }
diff --git a/lib/inc/drogon/MultiPart.h b/lib/inc/drogon/MultiPart.h
index b364642f..6979158a 100644
--- a/lib/inc/drogon/MultiPart.h
+++ b/lib/inc/drogon/MultiPart.h
@@ -77,7 +77,7 @@ class HttpFile
     /// Return the file content.
     char *fileData() noexcept
     {
-#if __cplusplus >= 201703L | defined _WIN32
+#if __cplusplus >= 201703L || (defined _MSC_VER && _MSC_VER > 1900)
         return fileContent_.data();
 #else
         return (char *)(fileContent_.data());
diff --git a/lib/inc/drogon/utils/any.h b/lib/inc/drogon/utils/any.h
index 0faa4275..63abd2e8 100644
--- a/lib/inc/drogon/utils/any.h
+++ b/lib/inc/drogon/utils/any.h
@@ -13,7 +13,7 @@
  */
 
 #pragma once
-#if __cplusplus >= 201703L | defined _WIN32
+#if __cplusplus >= 201703L || (defined _MSC_VER && _MSC_VER > 1900)
 #include <any>
 #else
 #include <boost/any.hpp>
@@ -21,7 +21,7 @@
 
 namespace drogon
 {
-#if __cplusplus >= 201703L | defined _WIN32
+#if __cplusplus >= 201703L || (defined _MSC_VER && _MSC_VER > 1900)
 using std::any;
 using std::any_cast;
 #else
diff --git a/lib/inc/drogon/utils/string_view.h b/lib/inc/drogon/utils/string_view.h
index c2809c83..47b0aa27 100644
--- a/lib/inc/drogon/utils/string_view.h
+++ b/lib/inc/drogon/utils/string_view.h
@@ -13,7 +13,7 @@
  */
 
 #pragma once
-#if __cplusplus >= 201703L | defined _WIN32
+#if __cplusplus >= 201703L || (defined _MSC_VER && _MSC_VER > 1900)
 #include <string_view>
 #else
 #include <boost/utility/string_view.hpp>
@@ -24,7 +24,7 @@
 
 namespace drogon
 {
-#if __cplusplus >= 201703L | defined _WIN32
+#if __cplusplus >= 201703L || (defined _MSC_VER && _MSC_VER > 1900)
 using std::string_view;
 #else
 using boost::string_view;
diff --git a/lib/src/HttpAppFrameworkImpl.cc b/lib/src/HttpAppFrameworkImpl.cc
index 10bc37e7..a32779a7 100644
--- a/lib/src/HttpAppFrameworkImpl.cc
+++ b/lib/src/HttpAppFrameworkImpl.cc
@@ -87,11 +87,14 @@ HttpAppFrameworkImpl::HttpAppFrameworkImpl()
       uploadPath_(rootPath_ + "uploads")
 {
 }
+
+static std::function<void()> f = [] {
+    LOG_TRACE << "Initialize the main event loop in the main thread";
+};
+
 /// Make sure that the main event loop is initialized in the main thread.
 drogon::InitBeforeMainFunction drogon::HttpAppFrameworkImpl::initFirst_([]() {
-    HttpAppFrameworkImpl::instance().getLoop()->runInLoop([]() {
-        LOG_TRACE << "Initialize the main event loop in the main thread";
-    });
+    HttpAppFrameworkImpl::instance().getLoop()->runInLoop(f);
 });
 
 namespace drogon
diff --git a/orm_lib/inc/drogon/orm/ResultIterator.h b/orm_lib/inc/drogon/orm/ResultIterator.h
index cdb22068..643ceb9d 100644
--- a/orm_lib/inc/drogon/orm/ResultIterator.h
+++ b/orm_lib/inc/drogon/orm/ResultIterator.h
@@ -115,7 +115,7 @@ class ConstReverseResultIterator : private ConstResultIterator
     using iterator_type::iterator_category;
     using iterator_type::pointer;
     using iterator_type::reference;
-    using iterator_type::value_type;
+    // using iterator_type::value_type;
 
     ConstReverseResultIterator(const ConstReverseResultIterator &rhs)
         : ConstResultIterator(rhs)
diff --git a/orm_lib/inc/drogon/orm/RowIterator.h b/orm_lib/inc/drogon/orm/RowIterator.h
index 10ec043e..5e2feb0e 100644
--- a/orm_lib/inc/drogon/orm/RowIterator.h
+++ b/orm_lib/inc/drogon/orm/RowIterator.h
@@ -111,7 +111,7 @@ class ConstReverseRowIterator : private ConstRowIterator
     using iterator_type::iterator_category;
     using iterator_type::pointer;
     using iterator_type::reference;
-    using iterator_type::value_type;
+    // using iterator_type::value_type;
 
     ConstReverseRowIterator(const ConstReverseRowIterator &rhs)
         : ConstRowIterator(rhs)
diff --git a/trantor b/trantor
index b152c54b..e052988f 160000
--- a/trantor
+++ b/trantor
@@ -1 +1 @@
-Subproject commit b152c54b1fd36c04fde8b400f5637617962260c9
+Subproject commit e052988f277d039e3392bd4d213a531e45b822a8