diff --git a/requirements_dev.txt b/requirements_dev.txt
index afb028c..d08762c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 pip==19.3
 bumpversion==0.5.3
-flake8==3.7.8
+flake8==4.0.1
 wheel==0.33.6
 coverage==4.5.4
 tox==3.14.0