diff --git a/setup.py b/setup.py
index a5595ca..e5fa212 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,6 @@ from os.path import dirname, realpath, join
 
 from setuptools import setup, find_packages
 
-
 here = dirname(realpath(__file__))
 
 with open(join(here, 'VERSION'), 'r') as ifile:
@@ -10,14 +9,21 @@ with open(join(here, 'VERSION'), 'r') as ifile:
 with open(join(here, 'requirements.txt'), 'r') as ifile:
     requirements = ifile.read().splitlines()
 
-setup(name='tfw',
-      version=version,
-      description='Avatao tutorial-framework',
-      url='https://github.com/avatao-content/baseimage-tutorial-framework',
-      author='Avatao.com Innovative Learning Kft.',
-      author_email='support@avatao.com',
-      license='custom',
-      packages=find_packages('lib'),
-      package_dir={'': 'lib'},
-      install_requires=requirements,
-      zip_safe=False)
+setup(
+    name = 'tfw',
+    version = version,
+    description = 'Avatao tutorial-framework',
+    url = 'https://github.com/avatao-content/baseimage-tutorial-framework',
+    author = 'Avatao.com Innovative Learning Kft.',
+    author_email = 'support@avatao.com',
+    license = 'custom',
+    packages = find_packages('lib'),
+    package_dir = {'': 'lib'},
+    install_requires = requirements,
+    extras_require = {
+        'docs': [
+            'sphinx >= 1.7.0',
+        ],
+    },
+    zip_safe = False,
+)