diff --git a/requirements_test.txt b/requirements_test.txt
index b0d0d63..cd5b75a 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -9,6 +9,6 @@ flake8-bugbear
 bandit
 black
 check-python-versions
-tox==3.27.1
+tox==4.15.1
 tox-current-env
 pytest
\ No newline at end of file