diff --git a/pyproject.toml b/pyproject.toml
index d8977cc..c51d345 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 dev = [
     "click==8.1.7",  # pinning until mypy issues blow over
-    "black==24.4.2",
+    "black==24.8.0",
     "coverage==7.5.4",
     "flake8==7.1.0",
     "hatch==1.12.0",