diff --git a/pyproject.toml b/pyproject.toml
index f52be329..5600ed3d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -74,7 +74,7 @@ dev = [
     "flake8-no-implicit-concat==0.3.4",
     "flake8-print==5.0.0",
     "flake8-todos==0.3.0",
-    "flake8-simplify==0.20.0",
+    "flake8-simplify==0.21.0",
     "flake8-use-pathlib==0.3.0",
     "flake8-copyright==0.2.4",
     "ruff==0.0.291",