@@ 4,7 4,7 @@ 
 # You can set these variables from the command line, and also
 # from the environment for the first two.
 SPHINXOPTS    ?=
-SPHINXBUILD   = ../.tox/py37-sphinx/bin/sphinx-build
+SPHINXBUILD   = ../.tox/py38-sphinx/bin/sphinx-build
 SOURCEDIR     = .
 BUILDDIR      = _build