diff --git a/requirements.txt b/requirements.txt
index 1e75dbce..8c7e431c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ binaryornot==0.4.4
 # ------------------------------------------------------------------------------
 black==20.8b1
 isort==5.8.0
-flake8==3.9.0
+flake8==3.9.1
 flake8-isort==4.0.0
 pre-commit==2.12.0