diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8559347..003db55 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,4 +3,4 @@ twine==3.4.2
 wheel==0.37.0
 pytest==6.2.5
 pytest-cov==2.12.1
-flake8==3.9.2
+flake8==4.0.1