diff --git a/setup.py b/setup.py
index cdc17aa..8161cc8 100644
--- a/setup.py
+++ b/setup.py
@@ -27,6 +27,12 @@ setup(
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: Implementation :: CPython',
+        'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Internet :: Proxy Servers',
     ],
     long_description=long_description,