diff --git a/pyproject.toml b/pyproject.toml
index 31e0cf8..d65fcdb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ requires-python = ">=3.9"
 
 [project.optional-dependencies]
 dev = [
-    "black==22.12.0",
+    "black==23.9.1",
     "mypy",
     "flake8-isort",
     "Flake8-pyproject",