diff --git a/requirements-dev.txt b/requirements-dev.txt
index 056ff0d..0c61149 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
-flake8~=3.8.4
+flake8~=3.9.2
 flake8-annotations~=2.4.1
 flake8-bugbear~=20.1.4
 flake8-docstrings~=1.5.0