diff --git a/include/boost/implicit_cast.hpp b/include/boost/implicit_cast.hpp
index fa950c2..f0dd972 100644
--- a/include/boost/implicit_cast.hpp
+++ b/include/boost/implicit_cast.hpp
@@ -11,11 +11,6 @@
 # pragma once
 #endif
 
-
-#if defined(BOOST_NO_CXX11_CONSTEXPR)
-#error C++03 support is removed in Boost.Conversion 1.84
-#endif
-
 namespace boost {
 
 namespace detail {
diff --git a/include/boost/polymorphic_cast.hpp b/include/boost/polymorphic_cast.hpp
index a501cd0..818a0fe 100644
--- a/include/boost/polymorphic_cast.hpp
+++ b/include/boost/polymorphic_cast.hpp
@@ -49,18 +49,12 @@
 #ifndef BOOST_POLYMORPHIC_CAST_HPP
 #define BOOST_POLYMORPHIC_CAST_HPP
 
-#include <boost/config/assert_cxx11.hpp>
+#include <boost/config.hpp>
 
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
-
-#if defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
-#error C++03 support is removed in Boost.Conversion 1.84
-#endif
-
-
 # include <boost/assert.hpp>
 # include <boost/throw_exception.hpp>
 
diff --git a/include/boost/polymorphic_pointer_cast.hpp b/include/boost/polymorphic_pointer_cast.hpp
index f5d0726..1ab5d23 100644
--- a/include/boost/polymorphic_pointer_cast.hpp
+++ b/include/boost/polymorphic_pointer_cast.hpp
@@ -15,10 +15,6 @@
 #   pragma once
 #endif
 
-#if defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) || defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) || defined(BOOST_NO_CXX11_DECLTYPE)
-#error C++03 support is removed in Boost.Conversion 1.84
-#endif
-
 # include <boost/assert.hpp>
 # include <boost/pointer_cast.hpp>
 # include <boost/throw_exception.hpp>
diff --git a/meta/libraries.json b/meta/libraries.json
index 1a59a05..eb55c72 100644
--- a/meta/libraries.json
+++ b/meta/libraries.json
@@ -12,5 +12,5 @@
     "maintainers": [
         "Antony Polukhin <antoshkka -at- gmail.com>"
     ],
-    "cxxstd": "03"
+    "cxxstd": "11"
 }
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 7e62b66..c7a183d 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -12,7 +12,7 @@ import ../../config/checks/config : requires ;
 
 project
     : requirements
-        [ requires cxx11 ]
+        [ requires cxx11_rvalue_references ]
         # default to all warnings on:
         <warnings>all
         # set warnings as errors for those compilers we know we get warning free:
diff --git a/test/appveyor.yml b/test/appveyor.yml
index bcd3d9c..84c26e6 100644
--- a/test/appveyor.yml
+++ b/test/appveyor.yml
@@ -21,7 +21,7 @@ init:
 # From this point and below code is same for all the Boost libs
 ###############################################################################################################
 
-version: 1.71.{build}-{branch}
+version: 1.84.{build}-{branch}
  
 # branches to build
 branches:
@@ -32,9 +32,6 @@ skip_tags: true
 
 environment:
   matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0
-      ADDRMD: 32
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.1,clang-win
       CXXSTD: 14,17