diff --git a/requirements_dev.txt b/requirements_dev.txt
index e7f422e..6700b34 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,7 @@
 pip==9.0.1
 punch.py==1.4.2
 watchdog==0.8.3
-flake8==3.4.1
+flake8==3.5.0
 tox==2.9.1
 coverage==4.4.1
 Sphinx==1.6.4