diff --git a/pyproject.toml b/pyproject.toml
index ce2fc5f..98d5b95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -94,7 +94,7 @@ optional-dependencies.develop = [
   "munch<5",
   "mypy<1.20",
   "poethepoet<0.30",
-  "pyproject-fmt<2.6",
+  "pyproject-fmt<2.9",
   "ruff<0.15",
   "types-tabulate",
 ]