diff --git a/acme/setup.py b/acme/setup.py
index 36a724f97..ee55d6b7b 100644
--- a/acme/setup.py
+++ b/acme/setup.py
@@ -53,6 +53,9 @@ setup(
         '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',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Security',
     ],