diff --git a/appveyor.yml b/appveyor.yml
index 6c5f2103..2c951071 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,6 +9,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 14 2015"'
       BUILD_TYPE: Release
       BUILD_SHARED: 'OFF'
@@ -16,6 +17,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 14 2015 Win64"'
       BUILD_TYPE: Debug
       BUILD_SHARED: 'OFF'
@@ -23,6 +25,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 14 2015 Win64"'
       BUILD_TYPE: Release
       BUILD_SHARED: 'OFF'
@@ -30,6 +33,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 15 2017 Win64"'
       BUILD_TYPE: Debug
       BUILD_SHARED: 'OFF'
@@ -37,6 +41,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 15 2017 Win64"'
       BUILD_TYPE: Release
       BUILD_SHARED: 'OFF'
@@ -44,6 +49,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 15 2017 Win64"'
       BUILD_TYPE: Release
       BUILD_SHARED: 'ON'
@@ -51,6 +57,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'ON'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 15 2017 Win64"'
       BUILD_TYPE: Release
       BUILD_SHARED: 'ON'
@@ -58,6 +65,7 @@ environment:
       WCHAR_FILES: 'ON'
       BUILD_EXAMPLE: 'OFF'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 11
     - GENERATOR: '"Visual Studio 16 2019" -A x64'
       BUILD_TYPE: Release
       BUILD_SHARED: 'ON'
@@ -65,6 +73,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'OFF'
       USE_STD_FORMAT: 'OFF'
+      CXX_STANDARD: 17
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
     - GENERATOR: '"Visual Studio 17 2022" -A x64'
       BUILD_TYPE: Release
@@ -73,6 +82,7 @@ environment:
       WCHAR_FILES: 'OFF'
       BUILD_EXAMPLE: 'OFF'
       USE_STD_FORMAT: 'ON'
+      CXX_STANDARD: 23 # std::format is only available with /std:c++latest at the moment.
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2022
 build_script:
   - cmd: >-
@@ -84,7 +94,7 @@ build_script:
 
       set PATH=%PATH%;C:\Program Files\Git\usr\bin
 
-      cmake -G %GENERATOR% -D CMAKE_BUILD_TYPE=%BUILD_TYPE% -D BUILD_SHARED_LIBS=%BUILD_SHARED% -D SPDLOG_WCHAR_SUPPORT=%WCHAR% -D SPDLOG_WCHAR_FILENAMES=%WCHAR_FILES% -D SPDLOG_BUILD_EXAMPLE=%BUILD_EXAMPLE% -D SPDLOG_BUILD_EXAMPLE_HO=%BUILD_EXAMPLE% -D SPDLOG_BUILD_TESTS=ON -D SPDLOG_BUILD_TESTS_HO=OFF -D SPDLOG_BUILD_WARNINGS=ON -D SPDLOG_USE_STD_FORMAT=%USE_STD_FORMAT% ..
+      cmake -G %GENERATOR% -D CMAKE_BUILD_TYPE=%BUILD_TYPE% -D BUILD_SHARED_LIBS=%BUILD_SHARED% -D SPDLOG_WCHAR_SUPPORT=%WCHAR% -D SPDLOG_WCHAR_FILENAMES=%WCHAR_FILES% -D SPDLOG_BUILD_EXAMPLE=%BUILD_EXAMPLE% -D SPDLOG_BUILD_EXAMPLE_HO=%BUILD_EXAMPLE% -D SPDLOG_BUILD_TESTS=ON -D SPDLOG_BUILD_TESTS_HO=OFF -D SPDLOG_BUILD_WARNINGS=ON -D SPDLOG_USE_STD_FORMAT=%USE_STD_FORMAT% -D CMAKE_CXX_STANDARD=%CXX_STANDARD% ..
 
       cmake --build . --config %BUILD_TYPE%