diff --git a/tox.ini b/tox.ini
index 513bfa9..df78a20 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion=2.3.1
-envlist = py27,py33,py34,py35,py36,py37,flake8,linters,docs
+envlist = py27,py34,py35,py36,py37,flake8,linters,docs
 
 [testenv]
 deps =