diff --git a/pip/requirements.txt b/pip/requirements.txt
index 9db656c..638d091 100644
--- a/pip/requirements.txt
+++ b/pip/requirements.txt
@@ -14,7 +14,7 @@ flake8-expression-complexity==0.0.11
 flake8-import-order==0.18.2
 flake8-pytest-style==1.7.2
 flake8-return==1.2.0
-flake8-simplify==0.20.0
+flake8-simplify==0.21.0
 flake8==6.1.0
 magic-wormhole==0.13.0
 mypy==1.5.1