diff --git a/tox.ini b/tox.ini
index c360cd6..b9a07e4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,36,py,py3}, flake8, docs
+envlist = py{27,36,37,py,py3}, flake8, docs
 
 [testenv]
 passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH