diff --git a/tox.ini b/tox.ini
index 2a00d7665d7..da5820d49c9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,8 @@
 [tox]
 envlist = docs,py37,pep8
-minversion = 2.3.2
+minversion = 3.1.0
 skipsdist = True
+ignore_basepython_conflict = True
 
 [testenv]
 basepython = python3