diff --git a/package.json b/package.json
index 629d612..19cb1f5 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "prepublishOnly": "npm run typecheck && npm run build"
   },
   "devDependencies": {
-    "tsup": "^8.5.0",
+    "tsup": "^9.0.0",
     "tsx": "^4.20.0",
     "typescript": "^5.6.3"
   },