diff --git a/requirements_dev.txt b/requirements_dev.txt
index d477a77..d7d028b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==9.0.1
 bumpversion==0.5.3
 wheel==0.29.0
 watchdog==0.8.3
-flake8==3.2.1
+flake8==3.5.0
 tox==2.5.0
 coverage==4.2
 pytest-aiohttp==0.1.3