diff --git a/rma_lot/models/rma.py b/rma_lot/models/rma.py
index 55d18a98..f61364bb 100644
--- a/rma_lot/models/rma.py
+++ b/rma_lot/models/rma.py
@@ -5,7 +5,6 @@ from odoo import api, fields, models
 
 
 class Rma(models.Model):
-
     _inherit = "rma"
 
     lot_id = fields.Many2one(
diff --git a/rma_lot/pyproject.toml b/rma_lot/pyproject.toml
new file mode 100644
index 00000000..4231d0cc
--- /dev/null
+++ b/rma_lot/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"
diff --git a/rma_lot/wizards/stock_return_picking_line.py b/rma_lot/wizards/stock_return_picking_line.py
index f96353b8..9ce1b1a4 100644
--- a/rma_lot/wizards/stock_return_picking_line.py
+++ b/rma_lot/wizards/stock_return_picking_line.py
@@ -5,7 +5,6 @@ from odoo import models
 
 
 class StockReturnPickingLine(models.TransientModel):
-
     _inherit = "stock.return.picking.line"
 
     def _prepare_rma_vals(self):