diff --git a/requirements_dev.txt b/requirements_dev.txt
index c9088e5..9275de3 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==10.0.1
 bumpversion==0.5.3
 wheel==0.31.1
 watchdog==0.9.0
-flake8==3.5.0
+flake8==3.6.0
 tox==3.1.2
 coverage==4.5.1
 Sphinx==1.8.0