diff --git a/pyproject.toml b/pyproject.toml
index 0b05130..728264a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -69,7 +69,7 @@ optional-dependencies.develop = [
   "proselint<0.15",
   "pyproject-fmt<2.5",
   "ruff<0.8",
-  "validate-pyproject<0.21",
+  "validate-pyproject<0.23",
 ]
 optional-dependencies.release = [
   "build<2",