diff --git a/requirements_test.txt b/requirements_test.txt
index 6c9878b4..8120ae50 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 pytest==5.4.2
 pytest-timeout==1.3.4
-tox==3.15.1
+tox==4.1.3
 flake8==3.8.2
 flake8-commas==2.0.0
 flake8-comprehensions==3.2.2