First release screwup: cryptography does not support Python 2.4 or Python 2.5 so we do not either.
diff --git a/setup.py b/setup.py
index af39efc..95d8635 100755
--- a/setup.py
+++ b/setup.py
@@ -48,11 +48,10 @@
         'Operating System :: MacOS :: MacOS X',
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX',
-        'Programming Language :: Python :: 2.4',
-        'Programming Language :: Python :: 2.5',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Security :: Cryptography',