diff --git a/setup.py b/setup.py
index 9fdd3ee..edf4396 100644
--- a/setup.py
+++ b/setup.py
@@ -74,7 +74,12 @@ setup(
         'Operating System :: Unix',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Internet',
         'Topic :: Scientific/Engineering',