diff --git a/src/Shentun.Peis.Application.Contracts/AppointPatientRegisters/AppointPatientRegisterIdInputDto.cs b/src/Shentun.Peis.Application.Contracts/AppointPatientRegisters/AppointPatientRegisterIdInputDto.cs
index 626b2ce..bff7933 100644
--- a/src/Shentun.Peis.Application.Contracts/AppointPatientRegisters/AppointPatientRegisterIdInputDto.cs
+++ b/src/Shentun.Peis.Application.Contracts/AppointPatientRegisters/AppointPatientRegisterIdInputDto.cs
@@ -9,7 +9,7 @@ namespace Shentun.Peis.PlugIns
     public class AppointPatientRegisterIdInputDto
     {
         public Guid ThirdInterFaceId { get; set; }
-        public string AppointPatientRegisterId { get; set; }
+        public string? AppointPatientRegisterId { get; set; }
 
         public Guid PatientRegisterId { get; set; }
     }