diff --git a/requirements_dev.txt b/requirements_dev.txt
index 37681b0..72dc34a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@ pip==19.3.1
 bumpversion==0.5.3
 wheel==0.33.6
 watchdog==0.9.0
-flake8==3.4.1
+flake8==3.7.9
 tox==2.8.2
 coverage==4.4.1
 Sphinx==1.6.3