diff --git a/requirements_dev.txt b/requirements_dev.txt
index e0fbacf4c0..507de8f8eb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@
 black==20.8b1
 coverage[toml]==5.3
 coveralls==2.2.0
-flake8==3.8.4
+flake8==4.0.1
 pre-commit==2.9.2
 pytest==6.1.2
 pytest-vcr==1.0.2