diff --git a/DigitalData.UserManager.Application/DTOs/Base/BaseReadDto.cs b/DigitalData.UserManager.Application/DTOs/Base/BaseReadDto.cs
index 3265439..8d9508c 100644
--- a/DigitalData.UserManager.Application/DTOs/Base/BaseReadDto.cs
+++ b/DigitalData.UserManager.Application/DTOs/Base/BaseReadDto.cs
@@ -1,7 +1,8 @@
-using DigitalData.Core.DTO;
+using DigitalData.Core.Abstraction.Application.DTO;
 
 namespace DigitalData.UserManager.Application.DTOs.Base
 {
     // TODO: use getter - setter methods for a simple inheritance.
+    [Obsolete("Use DigitalData.Core.Exceptions and .Middleware")]
     public record BaseReadDto(int Id, string? AddedWho, DateTime? AddedWhen, string? ChangedWho, DateTime? ChangedWhen) : BaseDTO<int>(Id);
 }
\ No newline at end of file