diff --git a/setup.py b/setup.py
index ae7afe2..b0acba8 100755
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,10 @@
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',  # Could be more! Not tested yet.
+        # Python 3.2 is not supported because "future" is incompatible with it.
+        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
         'Topic :: Internet :: WWW/HTTP :: Session',
         'Topic :: System :: Systems Administration :: Authentication/Directory',
     ],