diff --git a/pychargifysimple/base.py b/pychargifysimple/base.py
index 8087325..b816a39 100644
--- a/pychargifysimple/base.py
+++ b/pychargifysimple/base.py
@@ -21,14 +21,13 @@ def __init__(self, api_key, subdomain):
         self.api_key = api_key
         self.subdomain = subdomain
         self.url = '{subdomain}.{host}'.format(
-            subdomain=self.subdomain, host=self.host)
+            subdomain=self.subdomain, host=self.host
+        )
 
     def _call_api(self, path, method, params=None, data=None):
         request = getattr(requests, method)
         url = 'https://{url}/{path}'.format(url=self.url, path=path)
-        extra_parameters = {
-            'auth': (self.api_key, 'x')
-        }
+        extra_parameters = {'auth': (self.api_key, 'x')}
 
         if data:
             extra_parameters['json'] = data
diff --git a/pychargifysimple/context_manager.py b/pychargifysimple/context_manager.py
index 5e39cfd..45e0a03 100644
--- a/pychargifysimple/context_manager.py
+++ b/pychargifysimple/context_manager.py
@@ -1,9 +1,10 @@
 # -*- coding: utf-8 -*-
 from contextlib import contextmanager
 
-import mechanicalsoup
 from fake_useragent import UserAgent
 
+import mechanicalsoup
+
 
 @contextmanager
 def login(user, password):
diff --git a/pychargifysimple/subscription.py b/pychargifysimple/subscription.py
index d6886be..4a9d9dd 100644
--- a/pychargifysimple/subscription.py
+++ b/pychargifysimple/subscription.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from pychargifysimple.base import Chargify
+from .base import Chargify
 
 
 class ChargifySubscription(Chargify):
@@ -41,8 +41,12 @@ def get_subscription(self, subscription):
         @return: The subscription detail
         @rtype : dict
         """
-        return self._call_api('{base}/{subscription}.json'.format(
-            base=self.base, subscription=subscription), method='get').json()
+        return self._call_api(
+            '{base}/{subscription}.json'.format(
+                base=self.base, subscription=subscription
+            ),
+            method='get'
+        ).json()
 
     def change_next_billing_at(self, subscription, next_billing_at):
         """To change the next billing date of a subscription.
@@ -57,7 +61,8 @@ def change_next_billing_at(self, subscription, next_billing_at):
         @rtype : dict
         """
         url = '{base}/{subscription}.json'.format(
-            base=self.base, subscription=subscription)
+            base=self.base, subscription=subscription
+        )
         data = {
             'subscription': {
                 'next_billing_at': next_billing_at.isoformat()
@@ -79,12 +84,9 @@ def change_expires_at(self, subscription, expires_at):
         @rtype : dict
         """
         url = '{base}/{subscription}.json'.format(
-            base=self.base, subscription=subscription)
-        data = {
-            'subscription': {
-                'expires_at': expires_at.isoformat()
-            }
-        }
+            base=self.base, subscription=subscription
+        )
+        data = {'subscription': {'expires_at': expires_at.isoformat()}}
 
         return self._call_api(url, 'put', data=data).json()
 
@@ -101,7 +103,8 @@ def delete_subscription(self, subscription, customer):
         @rtype : dict
         """
         url = '{base}/{subscription}/purge.json'.format(
-            base=self.base, subscription=subscription, customer=customer)
+            base=self.base, subscription=subscription, customer=customer
+        )
         data = {'ack': customer}
 
         return self._call_api(url, 'post', params=data).json()
diff --git a/pychargifysimple/web.py b/pychargifysimple/web.py
index 4d40a7f..13089ee 100644
--- a/pychargifysimple/web.py
+++ b/pychargifysimple/web.py
@@ -2,10 +2,9 @@
 """A module to manage the web part of chargify like delete subscription."""
 import logging
 
-from mechanicalsoup.browser import LinkNotFoundError
-
-from pychargifysimple.context_manager import login
+from .context_manager import login
 
+from mechanicalsoup.browser import LinkNotFoundError
 
 logger = logging.getLogger(__name__)
 
@@ -42,14 +41,18 @@ def delete_subscription(self, subscription):
         with login(self.user, self.password) as browser:
             browser.open(
                 '{url}/subscriptions/{subscription}/delete'.format(
-                    url=self.url, subscription=subscription))
+                    url=self.url, subscription=subscription
+                )
+            )
 
             try:
                 browser.select_form('#delete_subscription_form')
             except LinkNotFoundError:
                 logger.error(
                     'The subscription {subscription} not found'.format(
-                        subscription=subscription))
+                        subscription=subscription
+                    )
+                )
                 return
 
             browser.submit_selected()
diff --git a/setup.py b/setup.py
index be53d24..43dca36 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 # http://www.opensource.org/licenses/MIT-license
 # Copyright (c) 2015, Hobbestigrou <hobbestigrou@erakis.eu>
 
-from setuptools import setup, find_packages
+from setuptools import find_packages, setup
 
 setup(
     name='pychargifysimple',
@@ -35,11 +35,8 @@
     ],
     packages=find_packages(),
     include_package_data=False,
-    install_requires=[
-        'MechanicalSoup', 'fake-useragent'
-    ],
+    install_requires=['MechanicalSoup', 'fake-useragent'],
     entry_points={
-        'console_scripts': [
-        ],
+        'console_scripts': [],
     },
 )