diff --git a/IRaCIS.Core.Application/Service/Common/FileService.cs b/IRaCIS.Core.Application/Service/Common/FileService.cs
index 94913e8c8..01cb9928e 100644
--- a/IRaCIS.Core.Application/Service/Common/FileService.cs
+++ b/IRaCIS.Core.Application/Service/Common/FileService.cs
@@ -94,7 +94,7 @@ namespace IRaCIS.Core.Application.Service
     #region DTO
     public class DoctorDownloadInfo
     {
-        public Guid Id { get; set; }
+        public Guid? Id { get; set; }
         public string Name { get; set; }
         public string ReviewerCode { get; set; }
 
@@ -111,7 +111,7 @@ namespace IRaCIS.Core.Application.Service
     {
         public int Language { get; set; }
 
-        public List<Guid> DoctorIdList { get; set; }
+        public List<Guid?> DoctorIdList { get; set; }
     }
 
     public class GetDoctoreAttachPathCommand