diff --git a/biscuit/apps/chronos/util.py b/biscuit/apps/chronos/util.py
index 4fdff2de99f33da620743bfb7153908844209453..98cabb72000da0007d36575b1c7c6809142a6f0f 100644
--- a/biscuit/apps/chronos/util.py
+++ b/biscuit/apps/chronos/util.py
@@ -1,9 +1,10 @@
 from datetime import datetime
 from typing import Optional
 
+from django.apps.AppConfig import get_model
 from django.db import models
 
-from .models import LessonPeriod
+LessonPeriod = get_model('chronos.LessonPeriod')  # noqa
 
 
 def current_week() -> int: