diff --git a/base_report_to_printer/static/description/index.html b/base_report_to_printer/static/description/index.html
index 45e1510..cf2a3f2 100644
--- a/base_report_to_printer/static/description/index.html
+++ b/base_report_to_printer/static/description/index.html
@@ -3,7 +3,7 @@
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<meta name="generator" content="Docutils 0.14: http://docutils.sourceforge.net/" />
+<meta name="generator" content="Docutils: http://docutils.sourceforge.net/" />
 <title>Report to printer</title>
 <style type="text/css">
 
diff --git a/base_report_to_printer/wizards/print_attachment_report.py b/base_report_to_printer/wizards/print_attachment_report.py
index 65914eb..3addc29 100644
--- a/base_report_to_printer/wizards/print_attachment_report.py
+++ b/base_report_to_printer/wizards/print_attachment_report.py
@@ -1,25 +1,26 @@
-# -*- coding: utf-8 -*-
 # Copyright 2020 Camptocamp SA
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
 import base64
 
-from openerp import _, models, api, fields
+from odoo import _, fields, models
 
 
 class PrintAttachment(models.TransientModel):
-    _name = 'wizard.print.attachment'
-    _description = 'Print Attachment'
+    _name = "wizard.print.attachment"
+    _description = "Print Attachment"
 
     printer_id = fields.Many2one(
-        comodel_name='printing.printer', string='Printer', required=True,
-        help='Printer used to print the attachments.'
+        comodel_name="printing.printer",
+        string="Printer",
+        required=True,
+        help="Printer used to print the attachments.",
     )
     attachment_line_ids = fields.One2many(
-        'wizard.print.attachment.line', 'wizard_id',
-        string='Attachments to print',
+        "wizard.print.attachment.line",
+        "wizard_id",
+        string="Attachments to print",
     )
 
-    @api.multi
     def print_attachments(self):
         """ Prints a label per selected record """
         self.ensure_one()
@@ -32,18 +33,15 @@ class PrintAttachment(models.TransientModel):
             content = base64.b64decode(data)
             content_format = att_line.get_format()
             self.printer_id.print_document(
-                None,
-                content=content,
-                format=content_format,
-                copies=att_line.copies
+                None, content=content, format=content_format, copies=att_line.copies
             )
         if errors:
             return {
-                'warning': _(
-                    'Following attachments could not be printed:\n\n%s'
-                    % '\n'.join(
+                "warning": _(
+                    "Following attachments could not be printed:\n\n%s"
+                    % "\n".join(
                         [
-                            _('%s (%s copies)') % (err.record_name, err.copies)
+                            _("%s (%s copies)") % (err.record_name, err.copies)
                             for err in errors
                         ]
                     )
@@ -52,23 +50,25 @@ class PrintAttachment(models.TransientModel):
 
 
 class PrintAttachmentLine(models.TransientModel):
-    _name = 'wizard.print.attachment.line'
-    _description = 'Print Attachment line'
+    _name = "wizard.print.attachment.line"
+    _description = "Print Attachment line"
 
     wizard_id = fields.Many2one("wizard.print.attachment")
     attachment_id = fields.Many2one(
-        'ir.attachment',
+        "ir.attachment",
         required=True,
-        domain="['|', ('mimetype', '=', 'application/pdf'), ('mimetype', '=', 'application/octet-stream')]"
+        domain=(
+            "['|', ('mimetype', '=', 'application/pdf'), "
+            "('mimetype', '=', 'application/octet-stream')]"
+        ),
     )
     record_name = fields.Char(related="attachment_id.res_name", readonly=True)
     copies = fields.Integer(default=1)
 
-    @api.multi
     def get_format(self):
         self.ensure_one()
         mimetype = self.attachment_id.mimetype
         if mimetype == "application/pdf":
             return "pdf"
         else:
-            return 'raw'
+            return "raw"
diff --git a/base_report_to_printer/wizards/print_attachment_report.xml b/base_report_to_printer/wizards/print_attachment_report.xml
index cc10e42..17354c2 100644
--- a/base_report_to_printer/wizards/print_attachment_report.xml
+++ b/base_report_to_printer/wizards/print_attachment_report.xml
@@ -1,50 +1,56 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<openerp>
-    <data>
-        <record id="wizard_print_attachment_form" model="ir.ui.view">
-            <field name="name">wizard.print.attachment</field>
-            <field name="model">wizard.print.attachment</field>
-            <field name="arch" type="xml">
-                <form string="Print attachments">
-                    <group>
-                        <field name="printer_id" />
-                        <field name="attachment_line_ids">
-                            <tree editable="top">
-                                <field name="attachment_id" create="0" />
-                                <field name="record_name" />
-                                <field name="copies" />
-                            </tree>
-                        </field>
-                    </group>
-                    <footer>
-                        <button name="print_attachments" string="Print" type="object" class="oe_highlight"/>
-                        or
-                        <button string="Cancel" class="oe_link" special="cancel"/>
-                    </footer>
-                </form>
-            </field>
-        </record>
-        <record id="wizard_print_attachment_line_form" model="ir.ui.view">
-            <field name="name">wizard.print.attachment.line.form</field>
-            <field name="model">wizard.print.attachment.line</field>
-            <field name="arch" type="xml">
-                <form>
-                    <group>
-                        <field name="attachment_id" create="0" />
-                        <field name="record_name" />
-                        <field name="copies" />
-                    </group>
-                </form>
-            </field>
-        </record>
-        <record id="action_wizard_print_attachment" model="ir.actions.act_window" >
-            <field name="name">Print Attachments</field>
-            <field name="type">ir.actions.act_window</field>
-            <field name="res_model">wizard.print.attachment</field>
-            <field name="view_type">form</field>
-            <field name="view_mode">form</field>
-            <field name="target">new</field>
-        </record>
-        <menuitem id="menu_action_wizard_print_attachment" action="action_wizard_print_attachment" sequence="50" parent="printing_menu" />
-    </data>
-</openerp>
+<?xml version="1.0" encoding="UTF-8" ?>
+<odoo>
+    <record id="wizard_print_attachment_form" model="ir.ui.view">
+        <field name="name">wizard.print.attachment</field>
+        <field name="model">wizard.print.attachment</field>
+        <field name="arch" type="xml">
+            <form string="Print attachments">
+                <group>
+                    <field name="printer_id" />
+                    <field name="attachment_line_ids">
+                        <tree editable="top">
+                            <field name="attachment_id" create="0" />
+                            <field name="record_name" />
+                            <field name="copies" />
+                        </tree>
+                    </field>
+                </group>
+                <footer>
+                    <button
+                        name="print_attachments"
+                        type="object"
+                        string="Print"
+                        class="btn-primary"
+                    />
+                    <button string="Cancel" class="btn-secondary" special="cancel" />
+                </footer>
+            </form>
+        </field>
+    </record>
+    <record id="wizard_print_attachment_line_form" model="ir.ui.view">
+        <field name="name">wizard.print.attachment.line.form</field>
+        <field name="model">wizard.print.attachment.line</field>
+        <field name="arch" type="xml">
+            <form>
+                <group>
+                    <field name="attachment_id" create="0" />
+                    <field name="record_name" />
+                    <field name="copies" />
+                </group>
+            </form>
+        </field>
+    </record>
+    <record id="action_wizard_print_attachment" model="ir.actions.act_window">
+        <field name="name">Print Attachments</field>
+        <field name="type">ir.actions.act_window</field>
+        <field name="res_model">wizard.print.attachment</field>
+        <field name="view_mode">form</field>
+        <field name="target">new</field>
+    </record>
+    <menuitem
+        id="menu_action_wizard_print_attachment"
+        action="action_wizard_print_attachment"
+        sequence="50"
+        parent="printing_menu"
+    />
+</odoo>
