diff --git a/tox.ini b/tox.ini
index da48eb1..9ea13ee 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py26, py27, py33
+envlist = py26, py27, py33, py37
 downloadcache = {toxworkdir}/_download/
 
 [testenv]