diff --git a/setup.py b/setup.py
index 08e2d94..b3fa948 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,4 @@
 import os
-import sys
 
 from setuptools import setup
 
@@ -22,10 +21,11 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
 
-
-extras_require = {"format" : ["rfc3987", "strict-rfc3339", "webcolors"],
-                              ":python_version=='2.6'": ["argparse", "repoze.lru"],
-                              ":python_version=='2.7'": ["functools32"]}
+extras_require = {
+    "format" : ["rfc3987", "strict-rfc3339", "webcolors"],
+    ":python_version=='2.6'": ["argparse", "repoze.lru"],
+    ":python_version=='2.7'": ["functools32"],
+}
 
 setup(
     name="jsonschema",