diff --git a/pyenzyme/model.py b/pyenzyme/model.py
index 23362aa..b1205c8 100644
--- a/pyenzyme/model.py
+++ b/pyenzyme/model.py
@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-from datetime import date, datetime
 from enum import Enum
 from typing import Generic, Optional, TypeVar
 from uuid import uuid4