diff --git a/requirements-tests.txt b/requirements-tests.txt
index 3db70ad..1b25af2 100644
--- a/requirements-tests.txt
+++ b/requirements-tests.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
 pytest==6.2.5
 pytest-cov==3.0.0
-flake8==3.9.2
+flake8==4.0.0
 pyflakes==2.3.1