diff --git a/sql_export_excel/__openerp__.py b/sql_export_excel/__manifest__.py
similarity index 90%
rename from sql_export_excel/__openerp__.py
rename to sql_export_excel/__manifest__.py
index c130eece7..237b2df70 100644
--- a/sql_export_excel/__openerp__.py
+++ b/sql_export_excel/__manifest__.py
@@ -1,10 +1,9 @@
-# -*- coding: utf-8 -*-
 # Copyright 2019 Akretion
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
 {
     'name': 'SQL Export Excel',
-    'version': '9.0.1.0.0',
+    'version': '12.0.1.0.0',
     'author': 'Akretion,Odoo Community Association (OCA)',
     'website': 'http://github/oca/server-tools',
     'license': 'AGPL-3',
diff --git a/sql_export_excel/models/sql_export.py b/sql_export_excel/models/sql_export.py
index bb1ea5e49..48a45cf90 100644
--- a/sql_export_excel/models/sql_export.py
+++ b/sql_export_excel/models/sql_export.py
@@ -1,9 +1,8 @@
-# -*- coding: utf-8 -*-
 # Copyright 2019 Akretion
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
 
 from openerp import api, exceptions, fields, models, _
-from cStringIO import StringIO
+from io import BytesIO
 import logging
 import base64
 _logger = logging.getLogger(__name__)
@@ -78,7 +77,7 @@ class SqlExport(models.Model):
         # Case we insert data in an existing excel file.
         if self.attachment_id:
             datas = self.attachment_id.datas
-            infile = StringIO()
+            infile = BytesIO()
             infile.write(base64.b64decode(datas))
             infile.seek(0)
             wb = openpyxl.load_workbook(filename=infile)
@@ -100,7 +99,7 @@ class SqlExport(models.Model):
         for index, row in enumerate(res, row_position):
             for col, val in enumerate(row, col_position):
                 ws.cell(row=index, column=col).value = val
-        output = StringIO()
+        output = BytesIO()
         wb.save(output)
         output.getvalue()
         output_datas = base64.b64encode(output.getvalue())
diff --git a/sql_export_excel/tests/__init__.py b/sql_export_excel/tests/__init__.py
index 22c4421ab..6d89d7607 100644
--- a/sql_export_excel/tests/__init__.py
+++ b/sql_export_excel/tests/__init__.py
@@ -1,2 +1 @@
-# -*- coding: utf-8 -*-
 from . import test_sql_query_excel
diff --git a/sql_export_excel/tests/test_sql_query_excel.py b/sql_export_excel/tests/test_sql_query_excel.py
index a51423c67..b1433c55b 100644
--- a/sql_export_excel/tests/test_sql_query_excel.py
+++ b/sql_export_excel/tests/test_sql_query_excel.py
@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
 # Copyright (C) 2019 Akretion (<http://www.akretion.com>)
 # @author: Florian da Costa
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp.tests.common import TransactionCase
+from odoo.tests.common import TransactionCase
 import base64
-from cStringIO import StringIO
+from io import BytesIO
 import logging
 
 _logger = logging.getLogger(__name__)
@@ -25,7 +24,7 @@ class TestExportSqlQueryExcel(TransactionCase):
     def get_workbook_from_query(self, wizard):
         wizard.export_sql()
         decoded_data = base64.b64decode(wizard.binary_file)
-        xlsx_file = StringIO(decoded_data)
+        xlsx_file = BytesIO(decoded_data)
         return openpyxl.load_workbook(xlsx_file)
 
     def test_excel_file_generation(self):
@@ -63,7 +62,7 @@ class TestExportSqlQueryExcel(TransactionCase):
         ws2 = wb.create_sheet("data")
         ws2.cell(row=1, column=1, value='Partner Id')
         ws2.cell(row=1, column=2, value='Partner Name')
-        output = StringIO()
+        output = BytesIO()
         wb.save(output)
         data = output.getvalue()