diff --git a/src/ImageProcessor.Web/NET4/ImageProcessor.Web.csproj b/src/ImageProcessor.Web/NET4/ImageProcessor.Web.csproj
index ca6ff7b4a..a5efaa84b 100644
--- a/src/ImageProcessor.Web/NET4/ImageProcessor.Web.csproj
+++ b/src/ImageProcessor.Web/NET4/ImageProcessor.Web.csproj
@@ -48,29 +48,29 @@
       <HintPath>..\..\packages\Csharp-Sqlite.3.7.7.1\lib\net40\Community.CsharpSqlite.SQLiteClient.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
-    <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 Include="Microsoft.Threading.Tasks">
+      <HintPath>..\..\packages\Microsoft.Bcl.Async.1.0.165\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions, 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.Extensions.dll</HintPath>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions">
+      <HintPath>..\..\packages\Microsoft.Bcl.Async.1.0.165\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.16.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\..\packages\Microsoft.Bcl.Async.1.0.16\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop">
+      <HintPath>..\..\packages\Microsoft.Bcl.Async.1.0.165\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Configuration" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.IO">
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.6\lib\net40\System.IO.dll</HintPath>
+    </Reference>
     <Reference Include="System.Net" />
     <Reference Include="System.Runtime">
-      <HintPath>..\..\packages\Microsoft.Bcl.1.0.19\lib\net40\System.Runtime.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.6\lib\net40\System.Runtime.dll</HintPath>
     </Reference>
     <Reference Include="System.Runtime.Caching" />
     <Reference Include="System.Threading.Tasks">
-      <HintPath>..\..\packages\Microsoft.Bcl.1.0.19\lib\net40\System.Threading.Tasks.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Bcl.1.1.6\lib\net40\System.Threading.Tasks.dll</HintPath>
     </Reference>
     <Reference Include="System.Web" />
     <Reference Include="System.Data" />
@@ -116,8 +116,12 @@
     <PostBuildEvent>xcopy /y "$(TargetPath)" "$(SolutionDir)\TestWebsites\NET4\bin"
 xcopy /y "$(TargetDir)$(TargetName).pdb" "$(SolutionDir)\TestWebsites\NET4\bin"</PostBuildEvent>
   </PropertyGroup>
-  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.8\tools\Microsoft.Bcl.Build.targets" />
   <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.targets')" />
+  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.13\tools\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.13\tools\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureBclBuildImported" BeforeTargets="BeforeBuild" Condition="'$(BclBuildImported)' == ''">
+    <Error Condition="!Exists('..\..\packages\Microsoft.Bcl.Build.1.0.13\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.1.0.13\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/src/ImageProcessor.Web/NET4/packages.config b/src/ImageProcessor.Web/NET4/packages.config
index 72b52ba35..019a4768e 100644
--- a/src/ImageProcessor.Web/NET4/packages.config
+++ b/src/ImageProcessor.Web/NET4/packages.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Csharp-Sqlite" version="3.7.7.1" targetFramework="net40" />
-  <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="1.0.8" targetFramework="net40" />
+  <package id="Microsoft.Bcl" version="1.1.6" targetFramework="net40" />
+  <package id="Microsoft.Bcl.Async" version="1.0.165" targetFramework="net40" />
+  <package id="Microsoft.Bcl.Build" version="1.0.13" targetFramework="net40" />
   <package id="sqlite-net" version="1.0.7" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/TestWebsites/NET4/Web.config b/src/TestWebsites/NET4/Web.config
index e1c69b994..a1282bef9 100644
--- a/src/TestWebsites/NET4/Web.config
+++ b/src/TestWebsites/NET4/Web.config
@@ -12,10 +12,10 @@
       <section name="cache" requirePermission="false" type="ImageProcessor.Web.Config.ImageCacheSection, ImageProcessor.Web" />
     </sectionGroup>
   </configSections>
-  <imageProcessor >
-    <security configSource="config\imageprocessor\security.config"/>
-    <cache configSource="config\imageprocessor\cache.config"/>
-    <processing configSource="config\imageprocessor\processing.config"/>
+  <imageProcessor>
+    <security configSource="config\imageprocessor\security.config" />
+    <cache configSource="config\imageprocessor\cache.config" />
+    <processing configSource="config\imageprocessor\processing.config" />
   </imageProcessor>
   <appSettings>
     <add key="webpages:Version" value="1.0.0.0" />
@@ -65,11 +65,11 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-2.5.19.0" newVersion="2.5.19.0" />
+        <bindingRedirect oldVersion="0.0.0.0-2.6.6.0" newVersion="2.6.6.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-2.5.19.0" newVersion="2.5.19.0" />
+        <bindingRedirect oldVersion="0.0.0.0-2.6.6.0" newVersion="2.6.6.0" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>