diff --git a/tox.ini b/tox.ini
index fb02855fa..38fd12906 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 2.0
 envlist = py27,py36,pep8,releasenotes
 skipsdist = True