diff --git a/requirements.txt b/requirements.txt
index 8b84730f1..6ad675ef4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ binaryornot==0.4.4
 # ------------------------------------------------------------------------------
 black==21.9b0
 isort==5.9.3
-flake8==3.9.2
+flake8==4.0.1
 flake8-isort==4.1.1
 pre-commit==2.15.0