diff --git a/package.json b/package.json
index 4041666c..a8d6d5f7 100644
--- a/package.json
+++ b/package.json
@@ -252,7 +252,7 @@
     "semantic-release": "^21.1.2",
     "stylelint": "^16.26.1",
     "svgo": "^4.0.0",
-    "tsdown": "^0.18.2",
+    "tsdown": "^0.21.0",
     "tsx": "^4.21.0",
     "typescript": "^5.9.3",
     "unist-util-is": "^6.0.1",