diff --git a/tox.ini b/tox.ini
index e9ec2536..22ead073 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 3.1.1
+minversion = 3.18.0
 envlist = docs,pep8
 skipsdist = True
 ignore_basepython_conflict = True
@@ -12,7 +12,7 @@ setenv =
 deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:docs]
-whitelist_externals = rm
+allowlist_externals = rm
 commands =
   rm -fr doc/build
   sphinx-build -W -b html doc/source doc/build/html