diff --git a/pyproject.toml b/pyproject.toml
index 2e2ddd7..71af766 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ develop = [
   "black<24",
   "mypy==1.7.1",
   "poethepoet<1",
-  "pyproject-fmt<1.3",
+  "pyproject-fmt<1.6",
   "ruff==0.1.8",
   "validate-pyproject<0.16",
 ]