diff --git a/requirements_dev.txt b/requirements_dev.txt
index 94dd2cc..e30ac47 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 pip==19.2.3
 bumpversion==0.5.3
-flake8==3.7.8
+flake8==4.0.1
 wheel==0.33.6
 watchdog==0.9.0
 pytest==5.1.2