diff --git a/pyproject.toml b/pyproject.toml
index 61d7a0c2..10f9d0cc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ docs = [
 ]
 dev = [
     "attribution == 1.6.2",
-    "black == 23.7.0",
+    "black == 23.9.1",
     "flake8 == 6.1.0",
     "flake8-bugbear == 23.7.10",
     "mypy == 1.5.1",