diff --git a/requirements_tests.txt b/requirements_tests.txt
index 3921a361b..88cda9f09 100644
--- a/requirements_tests.txt
+++ b/requirements_tests.txt
@@ -2,7 +2,7 @@ black==21.9b0
 codecov==2.1.12
 coverage==5.5
 flake8-docstrings==1.6.0
-flake8==3.9.2
+flake8==4.0.1
 pre-commit==2.15.0
 pydocstyle==6.1.1
 pylint==2.11.1