diff --git a/libzip.vcxproj b/libzip.vcxproj
index 592e5cb..069c2ca 100644
--- a/libzip.vcxproj
+++ b/libzip.vcxproj
@@ -42,14 +42,14 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>ClangCL</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>ClangCL</PlatformToolset>
+    <WholeProgramOptimization>false</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
@@ -87,14 +87,14 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <LinkIncremental>true</LinkIncremental>
     <TargetName>zipD64</TargetName>
-    <IncludePath>/EgtDev/Extern/libzip/Include;/EgtDev/Extern/zlib/Include;$(IncludePath)</IncludePath>
+    <IncludePath>C:\;/EgtDev/Extern/libzip/Include;/EgtDev/Extern/zlib/Include;$(IncludePath)</IncludePath>
     <OutDir>$(SolutionDir)$(Configuration)$(PlatformArchitecture)\</OutDir>
     <IntDir>$(Configuration)$(PlatformArchitecture)\</IntDir>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <LinkIncremental>false</LinkIncremental>
     <TargetName>zipR64</TargetName>
-    <IncludePath>/EgtDev/Extern/libzip/Include;/EgtDev/Extern/zlib/Include;$(IncludePath)</IncludePath>
+    <IncludePath>C:\;/EgtDev/Extern/libzip/Include;/EgtDev/Extern/zlib/Include;$(IncludePath)</IncludePath>
     <OutDir>$(SolutionDir)$(Configuration)$(PlatformArchitecture)\</OutDir>
     <IntDir>$(Configuration)$(PlatformArchitecture)\</IntDir>
   </PropertyGroup>
@@ -155,6 +155,7 @@ copy $(TargetPath) \EgtProg\Dll32</Command>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>
       </AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -181,6 +182,7 @@ copy $(TargetPath) \EgtProg\DllD64</Command>
       <ConformanceMode>true</ConformanceMode>
       <AdditionalIncludeDirectories>
       </AdditionalIncludeDirectories>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>