diff --git a/DbFirst.Application/Catalogs/CatalogReadDto.cs b/DbFirst.Application/Catalogs/CatalogReadDto.cs
index 1063fce..260e0da 100644
--- a/DbFirst.Application/Catalogs/CatalogReadDto.cs
+++ b/DbFirst.Application/Catalogs/CatalogReadDto.cs
@@ -3,9 +3,9 @@ namespace DbFirst.Application.Catalogs;
 public class CatalogReadDto
 {
     public int Guid { get; set; }
-    public string CatTitle { get; set; } = null!;
-    public string CatString { get; set; } = null!;
-    public string AddedWho { get; set; } = null!;
+    public string CatTitle { get; set; } = String.Empty;
+    public string CatString { get; set; } = String.Empty;
+    public string AddedWho { get; set; } = String.Empty;
     public DateTime AddedWhen { get; set; }
     public string? ChangedWho { get; set; }
     public DateTime? ChangedWhen { get; set; }