diff --git a/sf_manufacturing/models/purchase_order.py b/sf_manufacturing/models/purchase_order.py
index 9ca72267..1ffed728 100644
--- a/sf_manufacturing/models/purchase_order.py
+++ b/sf_manufacturing/models/purchase_order.py
@@ -10,7 +10,6 @@ from odoo.tools import OrderedSet
 # _get_surface_technics_purchase_ids
 class PurchaseOrder(models.Model):
     _inherit = 'purchase.order'
-
     def button_confirm(self):
         super().button_confirm()
         workorders = self.env['mrp.workorder'].search([('purchase_id', '=', self.id)])