diff --git a/tox.ini b/tox.ini
index c5d9d926..3c4d0cd8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,12 @@
 [tox]
-minversion = 3.1.0
+minversion = 3.18.0
 skipsdist = True
 envlist = py36,py38,pep8
 ignore_basepython_conflict = True
 
 [testenv]
 basepython = python3
-whitelist_externals = rm
+allowlist_externals = rm
 setenv = VIRTUAL_ENV={envdir}
          PYTHONWARNINGS=default::DeprecationWarning
 usedevelop = True
@@ -59,7 +59,7 @@ commands = sphinx-build -W --keep-going -b html doc/source doc/build/html
 # something is too large, likely from pulling in one of the conf sample files
 # [testenv:pdf-docs]
 # envdir = {toxworkdir}/docs
-# whitelist_externals =
+# allowlist_externals =
 #   make
 # commands =
 #   sphinx-build -W --keep-going -b latex doc/source doc/build/pdf