diff --git a/superfastcode/superfastcode.vcxproj b/superfastcode/superfastcode.vcxproj
index 7a1bb77..6016e6b 100644
--- a/superfastcode/superfastcode.vcxproj
+++ b/superfastcode/superfastcode.vcxproj
@@ -22,32 +22,32 @@
     <VCProjectVersion>15.0</VCProjectVersion>
     <ProjectGuid>{28F6146F-9862-4C07-A931-F3DE0A093BB7}</ProjectGuid>
     <RootNamespace>superfastcode</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.17134.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
@@ -87,12 +87,11 @@
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>%PYTHONPATH%\include</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>Py_LIMITED_API;_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>C:\Python311\include</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>%PYTHONPATH%\libs</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -101,10 +100,11 @@
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>%PYTHONPATH%\include</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>C:\Python311\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>%PYTHONPATH%\libs</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -115,14 +115,13 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>%PYTHONPATH%\include</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>Py_LIMITED_API;_WINDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>C:\Python311\include</AdditionalIncludeDirectories>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>%PYTHONPATH%\libs</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -133,12 +132,13 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>%PYTHONPATH%\include</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>C:\Python311\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalLibraryDirectories>%PYTHONPATH%\libs</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
diff --git a/superfastcode2/superfastcode2.vcxproj b/superfastcode2/superfastcode2.vcxproj
index 9eb9730..c744ddc 100644
--- a/superfastcode2/superfastcode2.vcxproj
+++ b/superfastcode2/superfastcode2.vcxproj
@@ -1,5 +1,5 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,64 +19,39 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
     <ProjectGuid>{98D5E983-CE8C-4AE5-9DA2-0374C81BFB86}</ProjectGuid>
-    <RootNamespace>superfastcode</RootNamespace>
-    <PythonVersion>3.6</PythonVersion>
-    <WindowsTargetPlatformVersion>10.0.17134.0</WindowsTargetPlatformVersion>
-    <ProjectName>superfastcode2</ProjectName>
+    <RootNamespace>superfastcode2</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
+    <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
-    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Label="PythonConfiguration">
-    <RegistryView>RegistryView.Registry32</RegistryView>
-    <RegistryView Condition="$(Platform) == 'x64'">RegistryView.Registry64</RegistryView>
-    <PythonTag>$(PythonVersion)-32</PythonTag>
-    <PythonTag Condition="$(Platform) == 'x64'">$(PythonVersion)</PythonTag>
-    <PythonHome Condition="$(PythonHome) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\$(PythonTag)\InstallPath', null, null, $(RegistryView)))</PythonHome>
-    <PythonHome Condition="$(PythonHome) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\$(PythonTag)\InstallPath', null, null, $(RegistryView)))</PythonHome>
-    <PythonExe Condition="$(PythonExe) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\$(PythonTag)\InstallPath', 'ExecutablePath', null, $(RegistryView)))</PythonExe>
-    <PythonExe Condition="$(PythonExe) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\$(PythonTag)\InstallPath', 'ExecutablePath', null, $(RegistryView)))</PythonExe>
-    <PythonExe Condition="$(PythonExe) == '' and $(PythonHome) != ''">$(PythonHome)python.exe</PythonExe>
-    <PythonDevVersion>$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'dev', null, $(RegistryView)))</PythonDevVersion>
-    <PythonDevVersion Condition="$(PythonDevVersion) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'dev', null, $(RegistryView)))</PythonDevVersion>
-    <PythonCorePDBVersion>$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'core_pdb', null, $(RegistryView)))</PythonCorePDBVersion>
-    <PythonCorePDBVersion Condition="$(PythonCorePDBVersion) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'core_pdb', null, $(RegistryView)))</PythonCorePDBVersion>
-    <PythonCoreDVersion>$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'core_d', null, $(RegistryView)))</PythonCoreDVersion>
-    <PythonCoreDVersion Condition="$(PythonCoreDVersion) == ''">$([MSBuild]::GetRegistryValueFromView('HKEY_LOCAL_MACHINE\SOFTWARE\Python\PythonCore\$(PythonTag)\InstalledFeatures', 'core_d', null, $(RegistryView)))</PythonCoreDVersion>
-    <PythonDebugSuffix Condition="$(PythonCoreDVersion) != ''">_d</PythonDebugSuffix>
-    <PythonDExe Condition="$(PythonExe) != '' and $(PythonDExe) == ''">$([System.IO.Path]::GetDirectoryName($(PythonExe)))\python$(PythonDebugSuffix).exe</PythonDExe>
-    <PythonDExe Condition="!Exists($(PythonDExe))">$(PythonExe)</PythonDExe>
+    <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <PropertyGroup>
-    <DefaultDebuggerFlavor>WindowsLocalDebugger</DefaultDebuggerFlavor>
-    <DefaultDebuggerFlavor Condition="$(HasPythonDebugLaunchProvider) == 'true'">PythonDebugLaunchProvider</DefaultDebuggerFlavor>
-  </PropertyGroup>
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
   <ImportGroup Label="Shared">
@@ -95,61 +70,41 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <TargetName>superfastcode$(PythonDebugSuffix)</TargetName>
     <TargetExt>.pyd</TargetExt>
-    <LocalDebuggerCommand>$(PythonDExe)</LocalDebuggerCommand>
-    <LocalDebuggerCommandArguments>-i -c "print('&gt;&gt;&gt; import superfastcode'); import superfastcode"</LocalDebuggerCommandArguments>
-    <LocalDebuggerEnvironment>PYTHONPATH=$(OutDir)</LocalDebuggerEnvironment>
-    <DebuggerFlavor>$(DefaultDebuggerFlavor)</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <TargetName>superfastcode2</TargetName>
     <TargetExt>.pyd</TargetExt>
-    <LocalDebuggerCommand>$(PythonExe)</LocalDebuggerCommand>
-    <LocalDebuggerCommandArguments>-i -c "print('&gt;&gt;&gt; import superfastcode'); import superfastcode"</LocalDebuggerCommandArguments>
-    <LocalDebuggerEnvironment>PYTHONPATH=$(OutDir)</LocalDebuggerEnvironment>
-    <DebuggerFlavor>$(DefaultDebuggerFlavor)</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-    <TargetName>superfastcode$(PythonDebugSuffix)</TargetName>
     <TargetExt>.pyd</TargetExt>
-    <LocalDebuggerCommand>$(PythonDExe)</LocalDebuggerCommand>
-    <LocalDebuggerCommandArguments>-i -c "print('&gt;&gt;&gt; import superfastcode'); import superfastcode"</LocalDebuggerCommandArguments>
-    <LocalDebuggerEnvironment>PYTHONPATH=$(OutDir)</LocalDebuggerEnvironment>
-    <DebuggerFlavor>$(DefaultDebuggerFlavor)</DebuggerFlavor>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-    <TargetName>superfastcode</TargetName>
     <TargetExt>.pyd</TargetExt>
-    <LocalDebuggerCommand>$(PythonExe)</LocalDebuggerCommand>
-    <LocalDebuggerCommandArguments>-i -c "print('&gt;&gt;&gt; import superfastcode'); import superfastcode"</LocalDebuggerCommandArguments>
-    <LocalDebuggerEnvironment>PYTHONPATH=$(OutDir)</LocalDebuggerEnvironment>
-    <DebuggerFlavor>$(DefaultDebuggerFlavor)</DebuggerFlavor>
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <RuntimeLibrary Condition="$(PythonCoreDVersion) == ''">MultithreadedDLL</RuntimeLibrary>
-      <AdditionalIncludeDirectories>$(PythonHome)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>C:\Python311\include;C:\Python311\Lib\site-packages\pybind11\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalLibraryDirectories>$(PythonHome)libs;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
-      <RuntimeLibrary Condition="$(PythonCoreDVersion) == ''">MultithreadedDLL</RuntimeLibrary>
-      <AdditionalIncludeDirectories>$(PythonHome)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>C:\Python311\include;C:\Python311\Lib\site-packages\pybind11\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalLibraryDirectories>$(PythonHome)libs;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -158,17 +113,15 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <RuntimeLibrary>Multithreaded</RuntimeLibrary>
-      <AdditionalIncludeDirectories>$(PythonHome)/Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>C:\Python311\include;C:\Python311\Lib\site-packages\pybind11\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <IgnoreSpecificDefaultLibraries>libucrt.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
-      <AdditionalDependencies>ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(PythonHome)libs;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -177,17 +130,15 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <RuntimeLibrary>Multithreaded</RuntimeLibrary>
-      <AdditionalIncludeDirectories>$(PythonHome)Include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+      <AdditionalIncludeDirectories>C:\Python311\include;C:\Python311\Lib\site-packages\pybind11\include</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
     </ClCompile>
     <Link>
-      <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <IgnoreSpecificDefaultLibraries>libucrt.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
-      <AdditionalDependencies>ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
-      <AdditionalLibraryDirectories>$(PythonHome)libs;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>C:\Python311\libs</AdditionalLibraryDirectories>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -199,9 +150,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-  <Target Name="_ValidatePythonInstall" BeforeTargets="PrepareForBuild">
-    <Error Condition="$(PythonHome) == ''" Text="Python $(PythonTag) is not installed. Please install Python $(PythonTag) and try again." />
-    <Error Condition="$(PythonDevVersion) == ''" Text="Python development files are not installed. Please add the development files, or repair your existing installation." />
-    <Warning Condition="$(PythonCorePDBVersion) == ''" Text="Python debug symbols are not installed. Installing the symbols through the Python installer is strongly recommended." />
-  </Target>
 </Project>
\ No newline at end of file