diff --git a/setup.py b/setup.py
index 185fd54..a8e7418 100644
--- a/setup.py
+++ b/setup.py
@@ -45,11 +45,11 @@ def read(*filenames, **kwargs):
         'Intended Audience :: Developers',
         'Operating System :: OS Independent',
         'License :: OSI Approved :: MIT License',
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Software Development :: Quality Assurance',
     ],