diff --git a/setup.py b/setup.py
index dd3b030..6d7d282 100644
--- a/setup.py
+++ b/setup.py
@@ -40,6 +40,7 @@
         'Operating System :: POSIX',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Utilities',
     ],
 )