diff --git a/requirements_dev.txt b/requirements_dev.txt
index b890571..3de5fac 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ click==8.0.1
 pre-commit==2.14.0
 coverage==5.5
 pip==21.2.3
-flake8==3.9.2
+flake8==4.0.1
 pytest==6.2.4
 pytest-cov==2.12.1
 pytest-runner==5.3.1