diff --git a/application/usage.py b/application/usage.py
index de854a4..2fc307a 100644
--- a/application/usage.py
+++ b/application/usage.py
@@ -1,5 +1,4 @@
 from pymongo import MongoClient
-from bson.son import SON
 from datetime import datetime
 from application.core.settings import settings
 from application.utils import count_tokens