diff --git a/requirements_dev.txt b/requirements_dev.txt
index 1aebd77..c0fae60 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,7 @@
 pip>=20.2.2
 wheel>=0.34.2
 watchdog==2.1.3
-flake8==3.9.2
+flake8==6.0.0
 tox==3.24.0
 coverage==5.5
 Sphinx==4.1.1