diff --git a/setup.py b/setup.py
index 404b418..1623687 100644
--- a/setup.py
+++ b/setup.py
@@ -19,6 +19,5 @@ setup(
         'Programming Language :: Python :: 3',
         'License :: OSI Approved :: MIT License',
         'Operating System :: POSIX'
-        'Operating System :: Unix'
     ],
 )