diff --git a/account_tax_balance/models/account_move.py b/account_tax_balance/models/account_move.py
index 1c21f0eb..dbf5ed9d 100644
--- a/account_tax_balance/models/account_move.py
+++ b/account_tax_balance/models/account_move.py
@@ -1,4 +1,4 @@
-# © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import api, fields, models
diff --git a/account_tax_balance/models/account_tax.py b/account_tax_balance/models/account_tax.py
index 218684c0..1e3c5fc0 100644
--- a/account_tax_balance/models/account_tax.py
+++ b/account_tax_balance/models/account_tax.py
@@ -1,5 +1,5 @@
-# © 2016 Lorenzo Battistini - Agile Business Group
-# © 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
+# Copyright 2016 Lorenzo Battistini - Agile Business Group
+# Copyright 2016 Antonio Espinosa <antonio.espinosa@tecnativa.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import _, api, fields, models
diff --git a/account_tax_balance/tests/__init__.py b/account_tax_balance/tests/__init__.py
index 0d3ea2d8..9b946414 100644
--- a/account_tax_balance/tests/__init__.py
+++ b/account_tax_balance/tests/__init__.py
@@ -1,5 +1,3 @@
-# © 2016 Lorenzo Battistini - Agile Business Group
-# © 2016 Giovanni Capalbo
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from . import test_account_tax_balance
diff --git a/account_tax_balance/wizard/open_tax_balances.py b/account_tax_balance/wizard/open_tax_balances.py
index e60c200d..1520988b 100644
--- a/account_tax_balance/wizard/open_tax_balances.py
+++ b/account_tax_balance/wizard/open_tax_balances.py
@@ -1,4 +1,4 @@
-# © 2016 Lorenzo Battistini - Agile Business Group
+# Copyright 2016 Lorenzo Battistini - Agile Business Group
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import _, api, fields, models