diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index e83873f..5297cc9 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -7,16 +7,7 @@
 from frappe.contacts.doctype.address.address import get_address_display
 from frappe.model.mapper import get_mapped_doc
 from frappe.model.utils import get_fetch_values
-from frappe.utils import (
-	add_days,
-	cint,
-	cstr,
-	flt,
-	formatdate,
-	get_link_to_form,
-	getdate,
-	nowdate,
-)
+from frappe.utils import add_days, cint, cstr, flt, formatdate, get_link_to_form, getdate, nowdate
 
 import erpnext
 from erpnext.accounts.deferred_revenue import validate_service_stop_date