diff --git a/tox.ini b/tox.ini
index 3975df9..d9250dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 3.18.0
 skipsdist = True
 envlist = bashate
 
@@ -9,7 +9,7 @@ install_command = pip install {opts} {packages}
 
 [testenv:bashate]
 deps = bashate
-whitelist_externals = bash
+allowlist_externals = bash
 commands = bash -c "find {toxinidir}          \
          -not \( -type d -name .?\* -prune \) \
          -not \( -type d -name doc -prune \)  \
@@ -31,11 +31,11 @@ deps =
 commands =
   rm -rf doc/build
   sphinx-build -W -b html doc/source doc/build/html
-whitelist_externals = rm
+allowlist_externals = rm
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
-whitelist_externals =
+allowlist_externals =
    make
 commands =
    sphinx-build -W -b latex doc/source doc/build/pdf