diff --git a/Octokit.Reactive/Octokit.Reactive.csproj b/Octokit.Reactive/Octokit.Reactive.csproj
index 952ecb64..1f889531 100644
--- a/Octokit.Reactive/Octokit.Reactive.csproj
+++ b/Octokit.Reactive/Octokit.Reactive.csproj
@@ -9,8 +9,9 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>Octokit.Reactive</RootNamespace>
     <AssemblyName>Octokit.Reactive</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,23 +34,40 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.16\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions">
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.16\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.16\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
-    <Reference Include="System.Reactive.Core, Version=2.0.20823.0, Culture=neutral, PublicKeyToken=f300afd708cefcd3, processorArchitecture=MSIL">
+    <Reference Include="System.Net" />
+    <Reference Include="System.Reactive.Core, Version=2.1.30214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Rx-Core.2.0.21114\lib\Net40\System.Reactive.Core.dll</HintPath>
+      <HintPath>..\..\..\octokit.net\packages\Rx-Core.2.0.21114\lib\Net40\System.Reactive.Core.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.Interfaces, Version=2.0.20823.0, Culture=neutral, PublicKeyToken=f300afd708cefcd3, processorArchitecture=MSIL">
+    <Reference Include="System.Reactive.Interfaces, Version=2.1.30214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Rx-Interfaces.2.0.21114\lib\Net40\System.Reactive.Interfaces.dll</HintPath>
+      <HintPath>..\..\..\octokit.net\packages\Rx-Interfaces.2.0.21114\lib\Net40\System.Reactive.Interfaces.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.Linq, Version=2.0.20823.0, Culture=neutral, PublicKeyToken=f300afd708cefcd3, processorArchitecture=MSIL">
+    <Reference Include="System.Reactive.Linq, Version=2.1.30214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Rx-Linq.2.0.21114\lib\Net40\System.Reactive.Linq.dll</HintPath>
+      <HintPath>..\..\..\octokit.net\packages\Rx-Linq.2.0.21114\lib\Net40\System.Reactive.Linq.dll</HintPath>
     </Reference>
-    <Reference Include="System.Reactive.PlatformServices, Version=2.0.20823.0, Culture=neutral, PublicKeyToken=f300afd708cefcd3, processorArchitecture=MSIL">
+    <Reference Include="System.Reactive.PlatformServices, Version=2.1.30214.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\Rx-PlatformServices.2.0.21114\lib\Net40\System.Reactive.PlatformServices.dll</HintPath>
+      <HintPath>..\..\..\octokit.net\packages\Rx-PlatformServices.2.0.21114\lib\Net40\System.Reactive.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Runtime">
+      <HintPath>..\packages\Microsoft.Bcl.1.0.19\lib\net40\System.Runtime.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Threading.Tasks">
+      <HintPath>..\packages\Microsoft.Bcl.1.0.19\lib\net40\System.Threading.Tasks.dll</HintPath>
     </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
@@ -93,6 +111,11 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureBclBuildImported" BeforeTargets="BeforeBuild" Condition="'$(BclBuildImported)' == ''">
+    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" Text="This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=317567." HelpKeyword="BCLBUILD2001" />
+    <Error Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.10\tools\Microsoft.Bcl.Build.targets')" Text="The build restored NuGet packages. Build the project again to include these packages in the build. For more information, see http://go.microsoft.com/fwlink/?LinkID=317568." HelpKeyword="BCLBUILD2002" />
+  </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/Octokit.Reactive/packages.config b/Octokit.Reactive/packages.config
index 2d00b9e8..a2d52fcb 100644
--- a/Octokit.Reactive/packages.config
+++ b/Octokit.Reactive/packages.config
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Microsoft.Bcl" version="1.0.19" targetFramework="net40" />
+  <package id="Microsoft.Bcl.Async" version="1.0.16" targetFramework="net40" />
+  <package id="Microsoft.Bcl.Build" version="1.0.10" targetFramework="net40" />
   <package id="Rx-Core" version="2.0.21114" targetFramework="net40" />
   <package id="Rx-Interfaces" version="2.0.21114" targetFramework="net40" />
   <package id="Rx-Linq" version="2.0.21114" targetFramework="net40" />