diff --git a/Src/Dlhis.Canteen/Order/Services/Implements/OrderService.cs b/Src/Dlhis.Canteen/Order/Services/Implements/OrderService.cs
index d0647e92..91452eb4 100644
--- a/Src/Dlhis.Canteen/Order/Services/Implements/OrderService.cs
+++ b/Src/Dlhis.Canteen/Order/Services/Implements/OrderService.cs
@@ -131,7 +131,7 @@ public class OrderService : BaseOrderService, IOrderService
                 DepartmentName = department.Name,
                 CurrentBalance = x.Balance
             })
-            .SingleAsync();
+            .FirstAsync();
 
         return new DefaultApiResult<OrderResultResponse>
         {