diff --git a/tox.ini b/tox.ini
index b36d00c..baeb57f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,6 +32,7 @@ commands =
 deps =
     flake8
     flake8-black; implementation_name == "cpython"
+    black==22.12.0; implementation_name == "cpython"
     flake8-bugbear
     flake8-import-order
 commands =