diff --git a/NorthwindCRUD/Models/Dtos/EmployeeDto.cs b/NorthwindCRUD/Models/Dtos/EmployeeDto.cs
index 99a0d46..9d9ef3b 100644
--- a/NorthwindCRUD/Models/Dtos/EmployeeDto.cs
+++ b/NorthwindCRUD/Models/Dtos/EmployeeDto.cs
@@ -22,9 +22,11 @@ public class EmployeeDto : IEmployee
         [SwaggerSchema("Title used in salutations")]
         public string TitleOfCourtesy { get; set; }
 
+        [DataType(DataType.Date, ErrorMessage = "BirthDate must be a valid date.")]
         [SwaggerSchema("Employee's birth date")]
         public string BirthDate { get; set; }
 
+        [DataType(DataType.Date, ErrorMessage = "HireDate must be a valid date.")]
         [SwaggerSchema("Employee's hire date")]
         public string HireDate { get; set; }
 
diff --git a/NorthwindCRUD/Models/Dtos/OrderDto.cs b/NorthwindCRUD/Models/Dtos/OrderDto.cs
index 565c0ba..721104c 100644
--- a/NorthwindCRUD/Models/Dtos/OrderDto.cs
+++ b/NorthwindCRUD/Models/Dtos/OrderDto.cs
@@ -15,8 +15,10 @@ public class OrderDto : IOrder
 
         public int ShipperId { get; set; }
 
+        [DataType(DataType.Date, ErrorMessage = "OrderDate must be a valid date.")]
         public string OrderDate { get; set; }
 
+        [DataType(DataType.Date, ErrorMessage = "RequiredDate must be a valid date.")]
         public string RequiredDate { get; set; }
 
         public Shipping? ShipVia { get; set; }