diff --git a/tox.ini b/tox.ini
index f05ef56..f35de10 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,9 @@
 [tox]
 envlist = py3,pep8,black_check,cover_report
-minversion = 3.1.1
-ignore_basepython_conflict = True
+minversion = 3.18.0
 
 [testenv]
 usedevelop = True
-basepython = python3
 deps =
   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt