diff --git a/tox.ini b/tox.ini
index dd1450da..b1661623 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,6 +25,7 @@ deps =
 commands = flake8
 
 [testenv:docs]
+basepython = python3
 deps =
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt