diff --git a/docs/conf.py b/docs/conf.py
index 3e2d3af9..018f77c3 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -57,7 +57,7 @@ author = u'ETS Labs'
 # The short X.Y version.
 # Getting version:
 with open('../src/dependency_injector/__init__.py') as init_file:
-    version = re.search('VERSION = \'(.*?)\'', init_file.read()).group(1)
+    version = re.search('__version__ = \'(.*?)\'', init_file.read()).group(1)
 
 # The full version, including alpha/beta/rc tags.
 release = version
diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index fbd34f81..7949cd36 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -11,6 +11,10 @@ Development version
 -------------------
 - No features.
 
+3.2.2
+-----
+- Change name of version variable to follow PEP8: ``VERSION`` -> ``__version__``.
+
 3.2.1
 -----
 - Update ``services`` miniapp example.
diff --git a/docs/main/installation.rst b/docs/main/installation.rst
index abfff964..b3956207 100644
--- a/docs/main/installation.rst
+++ b/docs/main/installation.rst
@@ -12,7 +12,7 @@ framework can be installed from PyPi_:
     pip install dependency_injector
 
     # Installing particular version:
-    pip install dependency-injector==3.0.0
+    pip install dependency-injector==3.2.2
     
 .. note::
     Some components of *Dependency Injector* are implemented as C extension types. 
@@ -33,9 +33,9 @@ Verification of currently installed version could be done using
 
 .. code-block:: bash
 
-    >>> from dependency_injector import VERSION
-    >>> VERSION
-    '3.0.0'
+    >>> import dependency_injector
+    >>> dependency_injector.__version__
+    '3.2.2'
 
 .. _PyPi: https://pypi.python.org/pypi/dependency_injector
 .. _GitHub: https://github.com/ets-labs/python-dependency-injector
diff --git a/setup.py b/setup.py
index bdb74e3f..cc4b1450 100644
--- a/setup.py
+++ b/setup.py
@@ -14,12 +14,12 @@ with open('README.rst') as readme_file:
     description = readme_file.read()
 
 # Getting requirements:
-with open('requirements.txt') as version:
-    requirements = version.readlines()
+with open('requirements.txt') as requirements_file:
+    requirements = requirements_file.readlines()
 
 # Getting version:
 with open('src/dependency_injector/__init__.py') as init_file:
-    version = re.search('VERSION = \'(.*?)\'', init_file.read()).group(1)
+    version = re.search('__version__ = \'(.*?)\'', init_file.read()).group(1)
 
 # Adding debug options:
 if os.environ.get('DEPENDENCY_INJECTOR_DEBUG_MODE') == '1':
diff --git a/src/dependency_injector/__init__.py b/src/dependency_injector/__init__.py
index d6a44fb8..7b62bf08 100644
--- a/src/dependency_injector/__init__.py
+++ b/src/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-VERSION = '3.2.1'
+__version__ = '3.2.2'
 """Version number that follows semantic versioning.
 
 :type: str
diff --git a/tests/unit/test_common.py b/tests/unit/test_common.py
index dfa915d3..3947da4c 100644
--- a/tests/unit/test_common.py
+++ b/tests/unit/test_common.py
@@ -2,10 +2,10 @@
 
 import unittest2 as unittest
 
-from dependency_injector import VERSION
+from dependency_injector import __version__
 
 
 class VersionTest(unittest.TestCase):
 
     def test_version_follows_semantic_versioning(self):
-        self.assertEquals(len(VERSION.split('.')), 3)
+        self.assertEquals(len(__version__.split('.')), 3)