diff --git a/tox.ini b/tox.ini
index c53cf303..e665ab52 100644
--- a/tox.ini
+++ b/tox.ini
@@ -74,7 +74,7 @@ commands =
 
 [testenv:black]
 basepython = python
-deps = black
+deps = git+https://github.com/psf/black
 commands = 
     black --check sacred/ tests/