diff --git a/Dice/Dice.vcxproj b/Dice/Dice.vcxproj
index f2e98508..6465cddf 100644
--- a/Dice/Dice.vcxproj
+++ b/Dice/Dice.vcxproj
@@ -23,7 +23,7 @@
     <ProjectGuid>{BA051175-B8E8-4104-9DD9-B9E225738C42}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>Dice</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.17763.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
     <ProjectName>com.w4123.dice</ProjectName>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
@@ -38,7 +38,7 @@
     <UseDebugLibraries>false</UseDebugLibraries>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v140</PlatformToolset>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>