diff --git a/setup.py b/setup.py
index f7044631756ba2d5338de7e5bdca41fd6bfe36cf..e9b60e9b8249b0f34d08e4ea35b87cddc2435957 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,13 @@ setup(name="pytools",
           'License :: OSI Approved :: MIT License',
           'Natural Language :: English',
           'Programming Language :: Python',
+            'Programming Language :: Python',
+            'Programming Language :: Python :: 2',
+            'Programming Language :: Python :: 2.6',
+            'Programming Language :: Python :: 2.7',
+            'Programming Language :: Python :: 3',
+            'Programming Language :: Python :: 3.3',
+            'Programming Language :: Python :: 3.4',
           'Topic :: Scientific/Engineering',
           'Topic :: Scientific/Engineering :: Information Analysis',
           'Topic :: Scientific/Engineering :: Mathematics',