diff --git a/aspnetcore/migration/31-to-50.md b/aspnetcore/migration/31-to-50.md
index e3e01dbfc9..73d58df16d 100644
--- a/aspnetcore/migration/31-to-50.md
+++ b/aspnetcore/migration/31-to-50.md
@@ -757,6 +757,12 @@ For more information, see [this GitHub issue](https://github.com/dotnet/aspnetco
 ## ASP.NET Core Module (ANCM)
 
 [!INCLUDE[](~/includes/hosting-bundle.md)]
+  
+## Package reference changes affecting some NuGet packages
+  
+With the migration of some `Microsoft.Extensions.*` NuGet packages from the [dotnet/extensions](https://github.com/dotnet/extensions) repository to [dotnet/runtime](https://github.com/dotnet/runtime), as described in [Migrating dotnet/extensions content to dotnet/runtime and dotnet/aspnetcore (aspnet/Announcements #411)](https://github.com/aspnet/Announcements/issues/411), packaging changes are being applied to some of the migrated packages. These changes often result in namespace changes for .NET API.
+  
+To research APIs further for app namespace changes when migrating to 5.0, use the [.NET API browser](https://docs.microsoft.com/dotnet/api/).
 
 ## Review breaking changes