diff --git a/configurations/__init__.py b/configurations/__init__.py
index 161f327..aa598da 100644
--- a/configurations/__init__.py
+++ b/configurations/__init__.py
@@ -2,7 +2,7 @@
 from .base import Settings, Configuration
 from .decorators import pristinemethod
 
-__version__ = '0.6'
+__version__ = '0.7'
 __all__ = ['Configuration', 'pristinemethod', 'Settings']
 
 
diff --git a/docs/index.rst b/docs/index.rst
index 7a1fc2c..3a85d8a 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -3,7 +3,7 @@
 Project templates
 ^^^^^^^^^^^^^^^^^
 
-Don't miss the Django :ref:`project templates pre-configured with 
+Don't miss the Django :ref:`project templates pre-configured with
 django-configurations<project-templates>` to simplify getting started
 with new Django projects.
 
diff --git a/setup.py b/setup.py
index e4e304f..909b3ae 100644
--- a/setup.py
+++ b/setup.py
@@ -1,23 +1,29 @@
 from __future__ import print_function
+import ast
 import os
-import re
 import codecs
 from setuptools import setup
 
 
+class VersionFinder(ast.NodeVisitor):
+    def __init__(self):
+        self.version = None
+
+    def visit_Assign(self, node):
+        if node.targets[0].id == '__version__':
+            self.version = node.value.s
+
+
 def read(*parts):
     filename = os.path.join(os.path.dirname(__file__), *parts)
     with codecs.open(filename, encoding='utf-8') as fp:
         return fp.read()
 
 
-def find_version(*file_paths):
-    version_file = read(*file_paths)
-    version_match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]",
-                              version_file, re.M)
-    if version_match:
-        return version_match.group(1)
-    raise RuntimeError("Unable to find version string.")
+def find_version(*parts):
+    finder = VersionFinder()
+    finder.visit(ast.parse(read(*parts)))
+    return finder.version
 
 
 setup(