diff --git a/setup.py b/setup.py
index f9fcbac..fdd69d2 100644
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@ License :: OSI Approved :: GNU General Public License v3 (GPLv3)
 Programming Language :: Python :: 2
 Programming Language :: Python :: 2.7
 Programming Language :: Python :: 3
+Programming Language :: Python :: 3.3
 Programming Language :: Python :: 3.4
 Programming Language :: Python :: 3.5
 Programming Language :: Python :: 3.6