diff --git a/dreadnode/api/models.py b/dreadnode/api/models.py
index 455cdfc..36eef3e 100644
--- a/dreadnode/api/models.py
+++ b/dreadnode/api/models.py
@@ -452,7 +452,7 @@ class Workspace(BaseModel):
     """URL-friendly slug for the workspace."""
     description: str | None
     """Description of the workspace."""
-    created_by: UUID
+    created_by: UUID | None = None
     """Unique identifier for the user who created the workspace."""
     org_id: UUID
     """Unique identifier for the organization the workspace belongs to."""