diff --git a/pyproject.toml b/pyproject.toml
index 5ded469..17ea8b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
   "bandit[toml]<2",
-  "black<26",
+  "black<27",
   "pyright<2",
   "pytest<10",
   "pytest-benchmark<6",