diff --git a/tox.ini b/tox.ini
index 1aca8d2..8e49272 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = {py27,py34,py35,py36,pypy}
+envlist = {py27,py34,py35,py36,py37,pypy}
 skip_missing_interpreters = True
 minversion = 2.4.0