diff --git a/src/Extensions/Directory.Build.props b/src/Extensions/Directory.Build.props
index 365cbc8a..f5fad5c9 100644
--- a/src/Extensions/Directory.Build.props
+++ b/src/Extensions/Directory.Build.props
@@ -4,6 +4,7 @@
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+  <Sdk Name="Microsoft.DotNet.PackageValidation" Version="1.0.0-preview.5.21302.8" />
   <ItemGroup Label="Make internals visible for the corresponding unit test assemblies and for Moq">
     <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
       <_Parameter1>$(AssemblyName).UnitTests$(StrongNameSuffix)</_Parameter1>