diff --git a/pyproject.toml b/pyproject.toml
index 67f7f63..e3a5322 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ develop = [
   "poethepoet<0.28",
   "pyproject-fmt<2.3",
   "ruff<0.6",
-  "validate-pyproject<0.19",
+  "validate-pyproject<0.20",
 ]
 doc = [
   "crate-docs-theme>=0.26.5",