diff --git a/package.json b/package.json
index 12282b8..3ee6675 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "prop-types-table": "^2.0.0",
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
-    "tsdown": "^0.20.3",
+    "tsdown": "^0.21.0",
     "typescript": "~5.9.0",
     "typescript-eslint": "^8.54.0",
     "vitest": "^4.0.18"