diff --git a/requirements_dev.txt b/requirements_dev.txt
index c6ea3e5..96d5565 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==19.3.1
 bumpversion==0.6.0
 wheel==0.34.2
 watchdog==0.9.0
-flake8==3.8.3
+flake8==3.8.4
 tox==3.20.0
 coverage==5.3
 Sphinx==3.2.1