diff --git a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingMedicineQuestionViewModel.cs b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingMedicineQuestionViewModel.cs
index 919d97299..6b67b73bc 100644
--- a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingMedicineQuestionViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingMedicineQuestionViewModel.cs
@@ -308,7 +308,7 @@ namespace IRaCIS.Core.Application.ViewModel
 		/// <summary>
 		/// 任务类型
 		/// </summary>
-		public ReadingCategory ReadingCategory { get; set; }
+		public ReadingCategory? ReadingCategory { get; set; }
 
 	}