diff --git a/pyproject.toml b/pyproject.toml
index beb4bad..d93549f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -104,7 +104,7 @@ optional-dependencies.develop = [
   "pyproject-fmt<2.5",
   "ruff<0.8",
   "sphinx-autobuild==2021.3.14", # Newer versions stopped "watching" appropriately?
-  "validate-pyproject<0.22",
+  "validate-pyproject<0.23",
 ]
 optional-dependencies.docs = [
   "furo",