diff --git a/setup.cfg b/setup.cfg
index 1f95c5c1..a0ee8fd9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,6 +17,8 @@ classifier =
   Programming Language :: Python
   Programming Language :: Python :: 2
   Programming Language :: Python :: 2.7
+  Programming Language :: Python :: 3
+  Programming Language :: Python :: 3.3
 
 [files]
 packages =