diff --git a/LLVMSharp.csproj b/LLVMSharp.csproj
index b30a46c6..772aa2a6 100644
--- a/LLVMSharp.csproj
+++ b/LLVMSharp.csproj
@@ -8,7 +8,9 @@
     <OutputType>Library</OutputType>
     <RootNamespace>LLVMSharp</RootNamespace>
     <AssemblyName>LLVMSharp</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TargetFrameworkProfile>Profile7</TargetFrameworkProfile>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -29,7 +31,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Conversions.cs" />
@@ -47,5 +48,5 @@
     <Compile Include="Overloads.cs" />
     <Compile Include="LLVMValueRef.cs" />
   </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
 </Project>
\ No newline at end of file