diff --git a/Learn.Archives.Core/Model/Student.cs b/Learn.Archives.Core/Model/Student.cs
index 7fbd550..0914450 100644
--- a/Learn.Archives.Core/Model/Student.cs
+++ b/Learn.Archives.Core/Model/Student.cs
@@ -26,7 +26,7 @@ namespace Learn.Archives.Core.Model
         /// 减免金额
         /// </summary>
         [SugarColumn(DecimalDigits =2, IsNullable = true)]
-        public decimal AmountRelief { get; set; }
+        public decimal? AmountRelief { get; set; }
         /// <summary>
         /// 减免是否申请
         /// </summary>