diff --git a/requirements.txt b/requirements.txt
index 34375f3..e156767 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ pytz==2024.1
 typing==3.10.0.0
 bumpversion==0.6.0
 flake8==7.1.1
-tox
+tox==4.18.0
 twine
 pytest
 pytest-runner