diff --git a/SportsStore/SportsStore.Domain/SportsStore.Domain.csproj b/SportsStore/SportsStore.Domain/SportsStore.Domain.csproj
index 4be4823..9055a61 100644
--- a/SportsStore/SportsStore.Domain/SportsStore.Domain.csproj
+++ b/SportsStore/SportsStore.Domain/SportsStore.Domain.csproj
@@ -35,6 +35,7 @@
       <HintPath>..\packages\Microsoft.Web.Infrastructure.1.0.0.0\lib\net40\Microsoft.Web.Infrastructure.dll</HintPath>
     </Reference>
     <Reference Include="System" />
+    <Reference Include="System.ComponentModel.DataAnnotations" />
     <Reference Include="System.Core" />
     <Reference Include="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.AspNet.WebPages.3.0.0\lib\net45\System.Web.Helpers.dll</HintPath>
diff --git a/SportsStore/SportsStore.UnitTests/SportsStore.UnitTests.csproj b/SportsStore/SportsStore.UnitTests/SportsStore.UnitTests.csproj
index 0cfe3d1..b7b6793 100644
--- a/SportsStore/SportsStore.UnitTests/SportsStore.UnitTests.csproj
+++ b/SportsStore/SportsStore.UnitTests/SportsStore.UnitTests.csproj
@@ -39,6 +39,7 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.CSharp" />
     <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\MSTest.TestFramework.2.1.2\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.dll</HintPath>
     </Reference>
@@ -62,6 +63,7 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Web" />
     <Reference Include="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.AspNet.WebPages.3.0.0\lib\net45\System.Web.Helpers.dll</HintPath>
     </Reference>
@@ -93,6 +95,16 @@
     <None Include="app.config" />
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SportsStore.Domain\SportsStore.Domain.csproj">
+      <Project>{ff997080-9285-4855-9290-22f8922776c0}</Project>
+      <Name>SportsStore.Domain</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\SportsStore.WebUI\SportsStore.WebUI.csproj">
+      <Project>{b2de8758-9a2c-48a6-804c-7349a3ff9b3c}</Project>
+      <Name>SportsStore.WebUI</Name>
+    </ProjectReference>
+  </ItemGroup>
   <Import Project="$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets" Condition="Exists('$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets')" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
diff --git a/SportsStore/SportsStore.WebUI/SportsStore.WebUI.csproj b/SportsStore/SportsStore.WebUI/SportsStore.WebUI.csproj
index 88fc0f5..7ef0d4c 100644
--- a/SportsStore/SportsStore.WebUI/SportsStore.WebUI.csproj
+++ b/SportsStore/SportsStore.WebUI/SportsStore.WebUI.csproj
@@ -129,6 +129,12 @@
     <Folder Include="Controllers\" />
     <Folder Include="Models\" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SportsStore.Domain\SportsStore.Domain.csproj">
+      <Project>{ff997080-9285-4855-9290-22f8922776c0}</Project>
+      <Name>SportsStore.Domain</Name>
+    </ProjectReference>
+  </ItemGroup>
   <PropertyGroup>
     <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
     <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>