diff --git a/pyproject.toml b/pyproject.toml
index 4ab7727..a5b0989 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -68,7 +68,7 @@ optional-dependencies.develop = [
   "poethepoet<0.32",
   "proselint<0.15",
   "pyproject-fmt<2.6",
-  "ruff<0.8",
+  "ruff<0.9",
   "validate-pyproject<0.24",
 ]
 optional-dependencies.release = [