diff --git a/requirements/develop.pip b/requirements/develop.pip
index d8e2706..10ffc30 100644
--- a/requirements/develop.pip
+++ b/requirements/develop.pip
@@ -1,5 +1,5 @@
 -e .[test]
-flake8==3.5.0
+flake8==4.0.0
 invoke==0.23.0
 readme-renderer==17.2
 wheel==0.30.0