diff --git a/base_transaction_id/models/invoice.py b/base_transaction_id/models/invoice.py
index d7aae172..e22f5634 100644
--- a/base_transaction_id/models/invoice.py
+++ b/base_transaction_id/models/invoice.py
@@ -2,17 +2,18 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
 
 
-from odoo import models, fields, api
+from odoo import api, fields, models
 
 
 class AccountInvoice(models.Model):
-    _inherit = 'account.invoice'
+    _inherit = "account.invoice"
 
-    transaction_id = fields.Char(string='Transaction ID',
-                                 index=True,
-                                 copy=False,
-                                 help="Transaction ID from the "
-                                      "financial institute")
+    transaction_id = fields.Char(
+        string="Transaction ID",
+        index=True,
+        copy=False,
+        help="Transaction ID from the " "financial institute",
+    )
 
     @api.multi
     def action_move_create(self):
diff --git a/base_transaction_id/models/sale.py b/base_transaction_id/models/sale.py
index d89615a0..3506e82e 100644
--- a/base_transaction_id/models/sale.py
+++ b/base_transaction_id/models/sale.py
@@ -2,22 +2,22 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
 
 
-from odoo import models, fields, api
+from odoo import api, fields, models
 
 
 class SaleOrder(models.Model):
-    _inherit = 'sale.order'
+    _inherit = "sale.order"
 
     transaction_id = fields.Char(
-        'Transaction ID',
+        "Transaction ID",
         required=False,
         copy=False,
-        help="Transaction id from the financial institute"
+        help="Transaction id from the financial institute",
     )
 
     @api.multi
     def _prepare_invoice(self):
         """Propagate the transaction_id from the sale order to the invoice."""
         invoice_vals = super()._prepare_invoice()
-        invoice_vals['transaction_id'] = self.transaction_id
+        invoice_vals["transaction_id"] = self.transaction_id
         return invoice_vals
diff --git a/base_transaction_id/readme/DESCRIPTION.rst b/base_transaction_id/readme/DESCRIPTION.rst
index c8f3edd9..d5325e6c 100644
--- a/base_transaction_id/readme/DESCRIPTION.rst
+++ b/base_transaction_id/readme/DESCRIPTION.rst
@@ -9,4 +9,4 @@ You can then add a mapping on that SO field to save the e-commerce financial
 Transaction ID into the Odoo sale order field.
 
 The main purpose is to ease the reconciliation process and be able to find the partner
-when importing the bank statement.
\ No newline at end of file
+when importing the bank statement.
diff --git a/base_transaction_id/views/invoice.xml b/base_transaction_id/views/invoice.xml
index 7c07a52e..09f4c4a4 100644
--- a/base_transaction_id/views/invoice.xml
+++ b/base_transaction_id/views/invoice.xml
@@ -1,15 +1,15 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <odoo>
 
   <record model="ir.ui.view" id="invoice_view_custom">
     <field name="name">customer.invoice.transaction.inherit</field>
     <field name="model">account.invoice</field>
-    <field name="inherit_id" ref="account.invoice_form"/>
+    <field name="inherit_id" ref="account.invoice_form" />
     <field name="arch" type="xml">
       <!-- target account.invoice.origin
            the first `origin` field of the view is declared in invoice lines -->
       <xpath expr="//page[@name='other_info']//field[@name='origin']" position="after">
-          <field name="transaction_id"/>
+          <field name="transaction_id" />
       </xpath>
     </field>
   </record>
@@ -17,10 +17,10 @@
   <record model="ir.ui.view" id="invoice_tree_custom">
     <field name="name">account.invoice.tree_inherit</field>
     <field name="model">account.invoice</field>
-    <field name="inherit_id" ref="account.invoice_tree"/>
+    <field name="inherit_id" ref="account.invoice_tree" />
     <field name="arch" type="xml">
       <field name="origin" position="after">
-        <field name="transaction_id"/>
+        <field name="transaction_id" />
       </field>
     </field>
   </record>
diff --git a/base_transaction_id/views/sale.xml b/base_transaction_id/views/sale.xml
index e390ee86..3c0b8b30 100644
--- a/base_transaction_id/views/sale.xml
+++ b/base_transaction_id/views/sale.xml
@@ -1,13 +1,13 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8" ?>
 <odoo>
 
   <record id="view_order_form" model="ir.ui.view">
     <field name="name">base_transaction_id.sale.order.form</field>
     <field name="model">sale.order</field>
-    <field name="inherit_id" ref="sale.view_order_form"/>
+    <field name="inherit_id" ref="sale.view_order_form" />
     <field name="arch" type="xml">
       <group name="sale_pay" position="inside">
-        <field name="transaction_id"/>
+        <field name="transaction_id" />
       </group>
     </field>
   </record>