diff --git a/tox.ini b/tox.ini
index 3dc176958..8c2364b2f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist = py39,py38,py36,pep8,docs
-minversion = 3.18.0
+minversion = 4.11.0
 ignore_basepython_conflict = True
 
 [testenv]