diff --git a/tox.ini b/tox.ini
index e158f90f..b3173d65 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 3.1
+minversion = 3.18.0
 envlist = pep8,py27,py37,docs
 ignore_basepython_conflict = True
 
@@ -24,7 +24,7 @@ commands = stestr run --suppress-attachments {posargs}
 commands = pre-commit run -a
 
 [testenv:docs]
-whitelist_externals = rm
+allowlist_externals = rm
 deps =
   -r{toxinidir}/doc/requirements.txt
 commands =
@@ -33,7 +33,7 @@ commands =
   sphinx-build -W -b html doc/source doc/build/html {posargs}
 
 [testenv:releasenotes]
-whitelist_externals = rm
+allowlist_externals = rm
 deps = {[testenv:docs]deps}
 commands =
   rm -rf releasenotes/build