diff --git a/src/Packages/Microsoft.Internal.Extensions.DotNetApiDocs.Transport/Microsoft.Internal.Extensions.DotNetApiDocs.Transport.proj b/src/Packages/Microsoft.Internal.Extensions.DotNetApiDocs.Transport/Microsoft.Internal.Extensions.DotNetApiDocs.Transport.proj
index f9212aeacf8..41e9d3b63bd 100644
--- a/src/Packages/Microsoft.Internal.Extensions.DotNetApiDocs.Transport/Microsoft.Internal.Extensions.DotNetApiDocs.Transport.proj
+++ b/src/Packages/Microsoft.Internal.Extensions.DotNetApiDocs.Transport/Microsoft.Internal.Extensions.DotNetApiDocs.Transport.proj
@@ -32,6 +32,7 @@
     and some others depending on the 9.0 version. -->
     <PackageReference Include="System.Text.Encodings.Web" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" />
+    <PackageReference Include="System.Text.Json" />
   </ItemGroup>
 
   <!-- Include the reference assembly and put the documentation file next to it. -->