diff --git a/src/fiber_package/base.py b/src/fiber_package/base.py
index 26dfda4..51cc8c8 100644
--- a/src/fiber_package/base.py
+++ b/src/fiber_package/base.py
@@ -1,7 +1,9 @@
-from pydantic import BaseModel, UUID7
+from pydantic import BaseModel, UUID7, Field
+from datetime import datetime
 
 from .refs import CollectionName
 
 class FiberBaseModel(BaseModel):
     uuid: UUID7
     collection_name: CollectionName
+    last_change: datetime = Field(default_factory=lambda: datetime.now())