diff --git a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
index 432654d04..dafdfcee2 100644
--- a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
@@ -69,7 +69,7 @@ namespace IRaCIS.Core.Application.Service.Reading.Dto
 
 
         [NotDefault]
-        public List<string> AnswerGroup { get; set; }
+        public List<AnswerGroupDto> AnswerGroup { get; set; }
     }
 
     public class GetTrialCriterionJudgeQuestionListOutDto