diff --git a/.appveyor.yml b/.appveyor.yml
index 31ebc6d..585675b 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -37,7 +37,6 @@ environment:
     # B2_THREADING: threading=multi,single
     B2_VARIANT: release
     B2_FLAGS: testing.execute=off
-    B2_DEFINES: BOOST_LOCALE_DISABLE_DEPRECATED_03_WARNING
 
   matrix:
     - FLAVOR: Visual Studio 2008, 2010, 2012
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4987224..40bf7d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,6 @@ env:
   B2_CI_VERSION: 1
   B2_VARIANT: debug,release
   B2_LINK: shared,static
-  B2_DEFINES: BOOST_LOCALE_DISABLE_DEPRECATED_03_WARNING
   LCOV_BRANCH_COVERAGE: 0
   CODECOV_NAME: Github Actions
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e9566fd..5e09099 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,7 @@ add_library(boost_locale
 add_library(Boost::locale ALIAS boost_locale)
 
 target_include_directories(boost_locale PUBLIC include PRIVATE src)
+target_compile_features(boost_locale PUBLIC cxx_std_11)
 
 target_link_libraries(boost_locale
   PUBLIC
diff --git a/build/Jamfile.v2 b/build/Jamfile.v2
index 3229550..3f080f6 100644
--- a/build/Jamfile.v2
+++ b/build/Jamfile.v2
@@ -5,6 +5,7 @@
 # Distributed under the Boost Software License, Version 1.0.
 # https://www.boost.org/LICENSE_1_0.txt.
 
+import config : requires ;
 import configure ;
 import feature ;
 import os ;
@@ -411,6 +412,19 @@ rule configure-flags ( properties * )
 
 alias build_flags : : : : <conditional>@configure-flags ;
 
+local cxx_requirements = [ requires
+      cxx11_auto_declarations
+      cxx11_defaulted_functions
+      cxx11_defaulted_moves
+      cxx11_hdr_functional
+      cxx11_hdr_type_traits
+      cxx11_noexcept
+      cxx11_override
+      cxx11_rvalue_references
+      cxx11_smart_ptr
+      cxx11_static_assert
+    ] ;
+
 boost-lib locale
     :
       encoding/codepage.cpp
@@ -427,6 +441,7 @@ boost-lib locale
       util/info.cpp
       util/locale_data.cpp
     :
+      $(cxx_requirements)
       # Don't link explicitly, not required
       <define>BOOST_THREAD_NO_LIB=1
       <include>$(TOP)/src
@@ -436,4 +451,5 @@ boost-lib locale
       <toolset>clang:<cxxflags>"-Wno-long-long -Wno-deprecated-declarations"
       # Meanwhile remove this
       <conditional>@configure
+    : : $(cxx_requirements)
     ;
diff --git a/doc/changelog.txt b/doc/changelog.txt
index d9b1aa9..f62e788 100644
--- a/doc/changelog.txt
+++ b/doc/changelog.txt
@@ -8,6 +8,8 @@
 /*!
 \page changelog Changelog
 
+- 1.81.0
+    - Require C++11 or higher
 - 1.80.0
     - Deprecated support for C++03 and earlier, C++11 will be required in the next release
     - Provide `-sICU_LINK_LOCALE` as a temporary replacement for `-sICU_LINK` which is incompatible with Boost.Regex.
@@ -19,7 +21,7 @@
     - Fix build failures due to missing includes
     - Handle or suppress many warnings which makes the build log cleaner
 - 1.67.0
-    - Added support of unique_ptr interface in addition to C++2003 auto_ptr - in order to support C++2017, now you can use BOOST_LOCALE_HIDE_AUTO_PTR definiton to remove auto_ptr from the interfaces and prevent deprecated watnings
+    - Added support of unique_ptr interface in addition to C++2003 auto_ptr - in order to support C++2017, now you can use BOOST_LOCALE_HIDE_AUTO_PTR definition to remove auto_ptr from the interfaces and prevent deprecated watnings
     - Fixed test problem with ICU >60.1
     - Fix of solaris build
     - Fixed wired FreeBSD/clang issue on optimized build. Probably compiler workaround
diff --git a/include/boost/locale/config.hpp b/include/boost/locale/config.hpp
index 518b601..3c7d836 100644
--- a/include/boost/locale/config.hpp
+++ b/include/boost/locale/config.hpp
@@ -46,25 +46,18 @@
 #define BOOST_LOCALE_USE_AUTO_PTR 1
 #endif
 
-// Check for C++11 features that will be used in Boost 1.81
-// If you are using Boost.Locale and REALLY require it to keep
-// supporting C++03/C++98 please comment with a detailed description
-// of your use case and reasoning why using C++11 is not possible in
-// https://github.com/boostorg/locale/issues/90
-#if !defined(BOOST_LOCALE_DISABLE_DEPRECATED_03_WARNING) && ( \
-     defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
-     defined(BOOST_NO_CXX11_DEFAULTED_MOVES) || \
-     defined(BOOST_NO_CXX11_HDR_FUNCTIONAL) || \
-     defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS) || \
-     defined(BOOST_NO_CXX11_NOEXCEPT) || \
-     defined(BOOST_NO_CXX11_OVERRIDE) || \
-     defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
-     defined(BOOST_NO_CXX11_SMART_PTR) || \
-     defined(BOOST_NO_CXX11_STATIC_ASSERT) \
-    )
-        #include <boost/config/pragma_message.hpp>
-        BOOST_PRAGMA_MESSAGE("CAUTION: Boost.Locale support for C++03 is deprecated. C++11 will be required from Boost 1.81 onwards.")
-        BOOST_PRAGMA_MESSAGE("CAUTION: Define BOOST_LOCALE_DISABLE_DEPRECATED_03_WARNING to suppress this message.")
+// Check for some C++11 features to provide easier checks for what is missing
+// shortly after the requirement of C++11 in Boost 1.81
+#if defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || \
+    defined(BOOST_NO_CXX11_DEFAULTED_MOVES) || \
+    defined(BOOST_NO_CXX11_HDR_FUNCTIONAL) || \
+    defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS) || \
+    defined(BOOST_NO_CXX11_NOEXCEPT) || \
+    defined(BOOST_NO_CXX11_OVERRIDE) || \
+    defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
+    defined(BOOST_NO_CXX11_SMART_PTR) || \
+    defined(BOOST_NO_CXX11_STATIC_ASSERT)
+        #error "Boost.Locale requires C++11 since Boost 1.81."
 #endif
 
 #ifdef _MSC_VER
diff --git a/meta/libraries.json b/meta/libraries.json
index 081ff45..d3c157b 100644
--- a/meta/libraries.json
+++ b/meta/libraries.json
@@ -12,5 +12,5 @@
         "Artyom Beilis <artyomtnk -at- yahoo.com>",
         "Alexander Grund <alex -at- grundis.de>"
     ],
-    "cxxstd": "03"
+    "cxxstd": "11"
 }