diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 0000000000..e1c6495da9
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,3 @@
+[settings]
+multi_line_output=4
+known_first_party=trytond
diff --git a/proteus/__init__.py b/proteus/__init__.py
index 403fea9066..7e41f4424b 100644
--- a/proteus/__init__.py
+++ b/proteus/__init__.py
@@ -3,9 +3,9 @@
 '''
 A library to access Tryton's models like a client.
 '''
-import threading
 import datetime
 import functools
+import threading
 from decimal import Decimal
 
 import proteus.config
diff --git a/proteus/config.py b/proteus/config.py
index 1d9a523a23..81bee69a1e 100644
--- a/proteus/config.py
+++ b/proteus/config.py
@@ -10,8 +10,8 @@ import os
 import threading
 import urllib.parse
 import xmlrpc.client
-from decimal import Decimal
 from contextlib import contextmanager
+from decimal import Decimal
 
 __all__ = ['set_trytond', 'set_xmlrpc', 'get_config']
 
diff --git a/proteus/pyson.py b/proteus/pyson.py
index 0b28b61ddf..a7cb0bb62d 100644
--- a/proteus/pyson.py
+++ b/proteus/pyson.py
@@ -1,11 +1,12 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-import json
 import datetime
+import json
 from decimal import Decimal
-from dateutil.relativedelta import relativedelta
 from functools import reduce
 
+from dateutil.relativedelta import relativedelta
+
 
 class PYSON(object):
 
diff --git a/proteus/tests/__init__.py b/proteus/tests/__init__.py
index 4918d37e9f..94c1daa2e2 100644
--- a/proteus/tests/__init__.py
+++ b/proteus/tests/__init__.py
@@ -1,9 +1,9 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
+import doctest
 import os
 import sys
 import unittest
-import doctest
 
 import proteus
 import proteus.config
diff --git a/proteus/tests/common.py b/proteus/tests/common.py
index dcbcc24ec9..063b948c8b 100644
--- a/proteus/tests/common.py
+++ b/proteus/tests/common.py
@@ -2,9 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 from unittest import TestCase
 
-from trytond.tests.test_tryton import db_exist, create_db
-
 from proteus import config
+from trytond.tests.test_tryton import create_db, db_exist
 
 
 class ProteusTestCase(TestCase):
diff --git a/proteus/tests/test_config.py b/proteus/tests/test_config.py
index 3841c860a4..50d576486b 100644
--- a/proteus/tests/test_config.py
+++ b/proteus/tests/test_config.py
@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 import proteus.config
+
 from .common import ProteusTestCase
 
 
diff --git a/proteus/tests/test_model.py b/proteus/tests/test_model.py
index a60a801062..1a5188e3f3 100644
--- a/proteus/tests/test_model.py
+++ b/proteus/tests/test_model.py
@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from proteus import Model
+
 from .common import ProteusTestCase
 
 
diff --git a/proteus/tests/test_report.py b/proteus/tests/test_report.py
index 3df9fc5d87..edb89f1d6d 100644
--- a/proteus/tests/test_report.py
+++ b/proteus/tests/test_report.py
@@ -1,12 +1,14 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 import unittest
+
 try:
     import pydot
 except ImportError:
     pydot = None
 
-from proteus import Report, Model
+from proteus import Model, Report
+
 from .common import ProteusTestCase
 
 
diff --git a/proteus/tests/test_wizard.py b/proteus/tests/test_wizard.py
index b36effcd62..3d1c9f7927 100644
--- a/proteus/tests/test_wizard.py
+++ b/proteus/tests/test_wizard.py
@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from proteus import Wizard, Model
+from proteus import Model, Wizard
+
 from .common import ProteusTestCase
 
 
diff --git a/setup.py b/setup.py
index 94e82c2e1a..6cd34338c4 100755
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,8 @@
 import io
 import os
 import re
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def read(fname):