diff --git a/package.json b/package.json
index 9342de0..ec6a774 100644
--- a/package.json
+++ b/package.json
@@ -25,10 +25,11 @@
     "check:fix": "biome check --write .",
     "build": "tsup",
     "build:clean": "npm run clean && npm run build",
+    "prepublishOnly": "npm run build:clean",
     "pack": "npm pack",
     "pack:clean": "rm -rf *.tgz && npm run pack",
     "prebuild": "npm run type-check",
-    "type-check": "tsc --noEmit"
+    "type-check": "tsc --noEmit",
   },
   "license": "LGPL-3.0-or-later",
   "homepage": "https://github.com/otterjs/csrf-csrf",