diff --git a/tox.ini b/tox.ini
index e2cc8df..9681d17 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py36,py35,py27,pypy,pep8
+envlist = py37,py36,py27,pypy,pep8
 skipsdist = True
 
 [testenv]