diff --git a/requirements_dev.txt b/requirements_dev.txt
index 88d8315..c44197a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==19.3.1
 bumpversion==0.5.3
 wheel==0.33.6
 watchdog==0.9.0
-flake8==3.7.8
+flake8==6.1.0
 tox==3.14.0
 coverage==4.5.4
 Sphinx==2.2.0