diff --git a/tox.ini b/tox.ini
index 4b6d3b2..344aacc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py26, py27, py33, py34, py35, py36
+envlist = py26, py27, py33, py34, py35, py36, py37
 [testenv]
 deps =
     {env:_PARSO_TEST_PYTEST_DEP:pytest>=3.0.7}