diff --git a/samples/ASP.NETCore/WebApplication/WebApplication.csproj b/samples/ASP.NETCore/WebApplication/WebApplication.csproj
index f9a3a2b3..01d4bc31 100644
--- a/samples/ASP.NETCore/WebApplication/WebApplication.csproj
+++ b/samples/ASP.NETCore/WebApplication/WebApplication.csproj
@@ -11,6 +11,7 @@
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Include="System.Net.Security" Version="4.3.2" />
+    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />    
   </ItemGroup>
 
   <ItemGroup>