diff --git a/source/dotnet/Library/AdaptiveCards.Templating.CSharp.WinRT/AdaptiveCards.Templating.WinRT.csproj b/source/dotnet/Library/AdaptiveCards.Templating.CSharp.WinRT/AdaptiveCards.Templating.WinRT.csproj
index 9225ea166a..4a74e69ec1 100644
--- a/source/dotnet/Library/AdaptiveCards.Templating.CSharp.WinRT/AdaptiveCards.Templating.WinRT.csproj
+++ b/source/dotnet/Library/AdaptiveCards.Templating.CSharp.WinRT/AdaptiveCards.Templating.WinRT.csproj
@@ -33,7 +33,7 @@
 
   <ItemGroup>
     <PackageReference Include="AdaptiveCards.Templating" Version="1.5.0" />
-    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.0.4" />
+    <PackageReference Include="Microsoft.Windows.CsWinRT" Version="2.1.1" />
   </ItemGroup>
 
 </Project>
diff --git a/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject.wapproj b/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject.wapproj
index c8f52d6db4..984f52f530 100644
--- a/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject.wapproj
+++ b/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject.wapproj
@@ -43,16 +43,16 @@
     <DefaultLanguage>en-US</DefaultLanguage>
     <PackageCertificateKeyFile>AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx</PackageCertificateKeyFile>
     <EntryPointProjectUniqueName>..\WPFVisualizer\AdaptiveCards.Sample.WPFVisualizer.csproj</EntryPointProjectUniqueName>
-    <PackageCertificateThumbprint>CDB52BC1A7F93B2E7D980BD9C235BDD6BFA59ECB</PackageCertificateThumbprint>
+    <PackageCertificateThumbprint>3bd5fc86b707a862b32aa301f34e37c77de44a11</PackageCertificateThumbprint>
     <AppxPackageSigningEnabled>True</AppxPackageSigningEnabled>
   </PropertyGroup>
   <ItemGroup>
     <AppxManifest Include="Package.appxmanifest">
       <SubType>Designer</SubType>
     </AppxManifest>
-    <None Include="AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx" />
     <Content Include="Images\BadgeLogo.scale-100.png" />
     <Content Include="Images\BadgeLogo.scale-200.png" />
     <Content Include="Images\BadgeLogo.scale-400.png" />
diff --git a/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx b/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx
index f7a7db6edb..14b43ae563 100644
Binary files a/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx and b/source/dotnet/Samples/WPFVisualizer.PackageProject/AdaptiveCards.Sample.WPFVisualizer.PackageProject_TemporaryKey.pfx differ