diff --git a/src/Speckle.Sdk/Api/GraphQL/Models/Model.cs b/src/Speckle.Sdk/Api/GraphQL/Models/Model.cs
index c22408c3..2d838b31 100644
--- a/src/Speckle.Sdk/Api/GraphQL/Models/Model.cs
+++ b/src/Speckle.Sdk/Api/GraphQL/Models/Model.cs
@@ -2,7 +2,7 @@
 
 public class Model
 {
-  public LimitedUser author { get; init; }
+  public LimitedUser? author { get; init; }
   public DateTime createdAt { get; init; }
   public string? description { get; init; }
   public string displayName { get; init; }