diff --git a/appveyor.yml b/appveyor.yml
index 3bfdbff59..14fce3f2c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,7 +15,7 @@ test_script:
   - vstest.console "src\Test\bin\%CONFIGURATION%\Test.dll" /logger:Appveyor
 
 cache:
-  - 'src\ui\packages -> **\src\ui\packages.config'
+  - 'packages -> **\src\ui\packages.config'
 
 matrix:
   fast_finish: true
diff --git a/src/Test/Test.csproj b/src/Test/Test.csproj
index 2a08429ec..22bc849f2 100644
--- a/src/Test/Test.csproj
+++ b/src/Test/Test.csproj
@@ -13,6 +13,8 @@
     <RootNamespace>Test</RootNamespace>
     <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
     <TargetFrameworkProfile />
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
@@ -42,10 +44,18 @@
       <Private>False</Private>
     </Reference>
     <Reference Include="NHunspell, Version=1.2.5554.16953, Culture=neutral, PublicKeyToken=1ac793ea843b4366, processorArchitecture=MSIL">
-      <HintPath>..\packages\NHunspell.1.2.5554.16953\lib\net\NHunspell.dll</HintPath>
+      <HintPath>..\..\packages\NHunspell.1.2.5554.16953\lib\net\NHunspell.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.Extensions, Version=2.2.29.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.Primitives, Version=4.2.29.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.WebRequest" />
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Xml" />
     <Reference Include="System.Xml.Linq" />
@@ -165,6 +175,13 @@
     </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
+  </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/src/Test/packages.config b/src/Test/packages.config
index e63106aa5..aba69b50e 100644
--- a/src/Test/packages.config
+++ b/src/Test/packages.config
@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net462" />
+  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net462" />
+  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net462" />
   <package id="NHunspell" version="1.2.5554.16953" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/src/ui/SubtitleEdit.csproj b/src/ui/SubtitleEdit.csproj
index fab1631fc..fd07e61a4 100644
--- a/src/ui/SubtitleEdit.csproj
+++ b/src/ui/SubtitleEdit.csproj
@@ -21,6 +21,8 @@
     <TargetFrameworkProfile>
     </TargetFrameworkProfile>
     <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -58,11 +60,10 @@
       <SpecificVersion>False</SpecificVersion>
     </Reference>
     <Reference Include="Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <HintPath>$(SolutionDir)\packages\Newtonsoft.Json.8.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
+      <HintPath>..\..\packages\Newtonsoft.Json.8.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="NHunspell, Version=1.2.5554.16953, Culture=neutral, PublicKeyToken=1ac793ea843b4366, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>$(SolutionDir)\NHunspell.1.2.5554.16953\lib\net\NHunspell.dll</HintPath>
+      <HintPath>..\..\packages\NHunspell.1.2.5554.16953\lib\net\NHunspell.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Data" />
@@ -70,10 +71,10 @@
     <Reference Include="System.EnterpriseServices" />
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Net.Http.Extensions, Version=2.2.29.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>$(SolutionDir)\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http.Primitives, Version=4.2.29.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>$(SolutionDir)\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
+      <HintPath>..\..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http.WebRequest" />
     <Reference Include="System.Web.Services" />
@@ -1660,6 +1661,12 @@
     <EmbeddedResource Include="Controls\WebBrowser\WebBrowserEditBox.html" />
     <Content Include="DLLs\Voikkox64.dll" />
     <Content Include="DLLs\Voikkox86.dll" />
+    <None Include="Hunspellx64.dll">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="Hunspellx86.dll">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <Content Include="Languages\ar-EG.xml">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Content>
@@ -1918,7 +1925,7 @@
       <Output TaskParameter="Result" PropertyName="HunspellVersion" />
     </XmlPeek>
     <PropertyGroup>
-      <HunspellDir>$(SolutionDir)\packages\NHunspell.$(HunspellVersion)\content\</HunspellDir>
+      <HunspellDir>..\..\packages\NHunspell.$(HunspellVersion)\content\</HunspellDir>
     </PropertyGroup>
     <Copy SourceFiles="@(HunspellAssemblies -> '$(HunspellDir)%(Identity)')" DestinationFolder="$(OutputPath)" SkipUnchangedFiles="True" />
     <Exec Command="%22$(SolutionDir)\build_helpers.bat%22 rev %22$(ConfigurationName)%22" />
@@ -1926,16 +1933,11 @@
   <Target Name="BeforeClean">
     <Delete Files="@(HunspellAssemblies -> '$(OutputPath)%(Identity)')" />
   </Target>
-  <Import Project="$(SolutionDir)\packages\Microsoft.Bcl.Build.1.0.14\tools\Microsoft.Bcl.Build.targets" Condition="Exists('$(SolutionDir)\packages\Microsoft.Bcl.Build.1.0.14\tools\Microsoft.Bcl.Build.targets')" />
-  <Target Name="EnsureBclBuildImported" BeforeTargets="BeforeBuild" Condition="'$(BclBuildImported)' == ''">
-    <Error Condition="!Exists('$(SolutionDir)\packages\Microsoft.Bcl.Build.1.0.14\tools\Microsoft.Bcl.Build.targets')" Text="This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=317567." HelpKeyword="BCLBUILD2001" />
-    <Error Condition="Exists('$(SolutionDir)\packages\Microsoft.Bcl.Build.1.0.14\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" />
+  <Import Project="..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
   </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">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-  -->
 </Project>
\ No newline at end of file
diff --git a/src/ui/packages.config b/src/ui/packages.config
index 080ebe863..b156a2b96 100644
--- a/src/ui/packages.config
+++ b/src/ui/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="ILRepack" version="2.0.18" targetFramework="net462" />
   <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net462" />
-  <package id="Microsoft.Bcl.Build" version="1.0.14" targetFramework="net462" />
+  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net462" />
   <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net462" />
   <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net462" />
   <package id="NHunspell" version="1.2.5554.16953" targetFramework="net462" />