diff --git a/X10D/X10D.csproj b/X10D/X10D.csproj
index 3c9c7ab..aaeb3bb 100644
--- a/X10D/X10D.csproj
+++ b/X10D/X10D.csproj
@@ -21,7 +21,8 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <LangVersion>7.1</LangVersion>
+    <LangVersion>8.0</LangVersion>
+    <PlatformTarget>x64</PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -30,7 +31,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <LangVersion>7.1</LangVersion>
+    <LangVersion>8.0</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />