diff --git a/tox.ini b/tox.ini
index 95f250f96..1c0a984ed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,7 +24,7 @@ commands =
     lint: python -m flake8 {posargs} {[_lint]files}
 
 [testenv:docs]
-basepython = python3.9
+basepython = python3.10
 deps = sphinx<4.4.0
 commands = sphinx-build -W -q -b html docs {envtmpdir}/html {posargs}