diff --git a/MDM/Models/Recipe/Dto/PfRecipeIssueLogDto.cs b/MDM/Models/Recipe/Dto/PfRecipeIssueLogDto.cs
index c7e7d6c..ef9da86 100644
--- a/MDM/Models/Recipe/Dto/PfRecipeIssueLogDto.cs
+++ b/MDM/Models/Recipe/Dto/PfRecipeIssueLogDto.cs
@@ -8,10 +8,10 @@ namespace RIZO.Model.MES.recipe.Dto
     /// </summary>
     public class PfRecipeIssueLogQueryDto : PagerInfo 
     {
-        public string RecipeCode { get; set; }
-        public string Version { get; set; }
-        public DateTime StartTime { get; set; }
-        public DateTime EndTime { get; set; }
+        public string? RecipeCode { get; set; }
+        public string? Version { get; set; }
+        public DateTime? StartTime { get; set; }
+        public DateTime? EndTime { get; set; }
     }
 
     /// <summary>
diff --git a/MDM/Models/Recipe/Dto/PfRecipeParametersDto.cs b/MDM/Models/Recipe/Dto/PfRecipeParametersDto.cs
index fd626e1..ba281ac 100644
--- a/MDM/Models/Recipe/Dto/PfRecipeParametersDto.cs
+++ b/MDM/Models/Recipe/Dto/PfRecipeParametersDto.cs
@@ -8,8 +8,8 @@ namespace RIZO.Model.MES.recipe.Dto
     /// </summary>
     public class PfRecipeParametersQueryDto : PagerInfo 
     {
-        public string RecipeCode { get; set; }
-        public string Version { get; set; }
+        public string? RecipeCode { get; set; }
+        public string? Version { get; set; }
     }
 
     /// <summary>
diff --git a/MDM/Models/Recipe/Dto/PfRecipeVersionDto.cs b/MDM/Models/Recipe/Dto/PfRecipeVersionDto.cs
index 521c783..19d668d 100644
--- a/MDM/Models/Recipe/Dto/PfRecipeVersionDto.cs
+++ b/MDM/Models/Recipe/Dto/PfRecipeVersionDto.cs
@@ -8,11 +8,11 @@ namespace RIZO.Model.MES.recipe.Dto
     /// </summary>
     public class PfRecipeVersionQueryDto : PagerInfo 
     {
-        public string RecipeCode { get; set; }
+        public string? RecipeCode { get; set; }
 
-        public string Version { get; set; }
+        public string? Version { get; set; }
 
-        public int Status { get; set; }
+        public int? Status { get; set; }
     }
 
     /// <summary>