diff --git a/apps/note/tables.py b/apps/note/tables.py
index 4d4e9608..31cefe41 100644
--- a/apps/note/tables.py
+++ b/apps/note/tables.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 import django_tables2 as tables
+from django.db.models import F
+
 from .models.transactions import Transaction