diff --git a/tox.ini b/tox.ini
index 63dd3bd5..31201366 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ setenv=
 
 [testenv:flake8]
 skip_install = true
-deps = flake8
+deps = flake8<6.0
        flake8-author
        flake8-blind-except
        flake8-bugbear