diff --git a/requirements/dev.txt b/requirements/dev.txt
index 592196a..577a1e0 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -3,7 +3,7 @@ bumpversion==0.5.3
 watchdog==0.9.0
 wheel==0.33.6
 Sphinx==2.2.0
-flake8==3.7.8
+flake8==6.0.0
 tox==3.14.0
 cryptography==2.8
 coverage==4.5.4