diff --git a/requirements-dev.txt b/requirements-dev.txt
index a283e0b..35caa64 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 -e .
-flake8==3.8.3
+flake8==3.8.4
 async-timeout==3.0.1
 pytest==6.1.1
 pytest-cov==2.10.1