diff --git a/tox.ini b/tox.ini
index 6d37603..d9a0dba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 3.1.1
+minversion = 3.18.0
 envlist = docs,py3
 skipsdist = True
 ignore_basepython_conflict = True
@@ -25,7 +25,7 @@ deps = -r{toxinidir}/requirements.txt doc8
 commands = doc8 doc/source
 
 [testenv:autobuild]
-whitelist_externals =
+allowlist_externals =
     sphinx-autobuild
 commands =
     sphinx-autobuild --watch specs --open-browser doc/source doc/build