diff --git a/biscuit/apps/chronos/models.py b/biscuit/apps/chronos/models.py
index 9f65c6ee69b7708cb2a98ed7f8c3e96262cb129c..b2cb3229a16321b5a56bcfa9183183941c12da7a 100644
--- a/biscuit/apps/chronos/models.py
+++ b/biscuit/apps/chronos/models.py
@@ -1,5 +1,5 @@
 from datetime import datetime
-from typing import List, Tuple, Optional
+from typing import Dict, Optional, List, Tuple
 
 from django.core import validators
 from django.db import models