diff --git a/app/models/transaction.py b/app/models/transaction.py
index eb8c03f..20030d9 100644
--- a/app/models/transaction.py
+++ b/app/models/transaction.py
@@ -1,6 +1,7 @@
 from datetime import datetime, timezone
 from app.extensions import db
 from sqlalchemy.exc import IntegrityError
+from sqlalchemy import and_, or_, not_
 
 class Transaction(db.Model):
     __tablename__ = 'transactions'