diff --git a/requirements_dev.txt b/requirements_dev.txt
index 4058952..8ab41ed 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==20.0.1
 bumpversion==0.5.3
 wheel==0.34.1
 watchdog==0.10.0
-flake8==3.7.9
+flake8==3.9.2
 tox==3.14.3
 coverage==5.0.3
 Sphinx==2.3.1