diff --git a/dev-requirements.txt b/dev-requirements.txt
index 13688ba..dfa7874 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,6 @@
 coverage==4.5.1
 fakeredis==0.7.0
-flake8==3.5.0
+flake8==4.0.1
 freezegun==0.3.15
 pytest-cov==2.5.1
 pytest==3.6.3