diff --git a/pyproject.toml b/pyproject.toml
index c5e02ea..49ed3c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -94,7 +94,7 @@ develop = [
   "mypy<1.12",
   "poethepoet<0.28",
   "pyproject-fmt<2.3",
-  "ruff<0.6",
+  "ruff<0.9",
   "validate-pyproject<0.19",
 ]
 docs = [