diff --git a/tox.ini b/tox.ini
index d283b86..354c596 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ commands = {posargs}
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pdf-docs]
-whitelist_externals =
+allowlist_externals =
    make
 commands =
    sphinx-build -W -b latex doc/source doc/build/pdf