diff --git a/app/services/invoice_pdf.py b/app/services/invoice_pdf.py
index f4c885d..18a8243 100644
--- a/app/services/invoice_pdf.py
+++ b/app/services/invoice_pdf.py
@@ -7,6 +7,7 @@ from datetime import datetime
 from decimal import Decimal, ROUND_HALF_UP
 from typing import Any
 
+
 REPORTLAB_AVAILABLE = True
 try:
     from reportlab.lib import colors