diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index bf6185796..c272ea25a 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -6,9 +6,6 @@
 - added: documentation on readthedocs.io
 - fixed: documentation displayed with `help`/`-h`/`--help`
 - improved: content of git-machete project related blogs has been moved to this repo and updated
-
-## New in git-machete 3.3.1
-
 - removed: releases to Nixpkgs no longer happen directly from our CI pipeline
 
 ## New in git-machete 3.3.0
diff --git a/tox.ini b/tox.ini
index 8dd229b70..74f388a87 100644
--- a/tox.ini
+++ b/tox.ini
@@ -54,6 +54,6 @@ whitelist_externals = tox
 commands = tox -e "mypy-py{36,37,38,39}"
 
 [testenv:mypy-py{36,37,38,39}]
-whitelist_externals = mypy
+deps = mypy
 commands =
   mypy --config-file mypy.ini git_machete