diff --git a/test-requirements.txt b/test-requirements.txt
index a2619fa6..8e6b9363 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 configparser==4.0.2
-flake8==3.7.9
+flake8==3.8.4
 mccabe==0.6.1
 mock>=3.0.5, <4.0.2
 pycodestyle==2.5.0