diff --git a/src/WorkFlow.Application/Dto/TfFileDto.cs b/src/WorkFlow.Application/Dto/TfFileDto.cs
index 4c1aac0..efea761 100644
--- a/src/WorkFlow.Application/Dto/TfFileDto.cs
+++ b/src/WorkFlow.Application/Dto/TfFileDto.cs
@@ -2,7 +2,7 @@
 
 public class TfFileDto
 {
-    public UriBuilder Url { get; set; } = null!;
+    public UriBuilder? Url { get; set; }
 
     public string? Headline { get; set; }