diff --git a/tox.ini b/tox.ini
index 9e9db1b5d..cc7f122f2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
+minversion = 3.18.0
 envlist = py3,pep8,docs
-minversion = 2.0
 skipsdist = True
 
 [testenv]