diff --git a/setup.cfg b/setup.cfg
index d745957d..4c48a658 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,7 +17,6 @@ classifier =
     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
 
diff --git a/tox.ini b/tox.ini
index cc68d315..96ebf223 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,pypy,pep8
+envlist = py27,py34,py35,pypy,pep8
 minversion = 1.6
 skipsdist = True