diff --git a/web/package.json b/web/package.json
index 6a1f9dd..53a080f 100644
--- a/web/package.json
+++ b/web/package.json
@@ -5,7 +5,7 @@
   "main": "src/app.js",
   "scripts": {
     "start": "parcel index.html --port 3000",
-    "build": "parcel build index.html",
+    "build": "parcel build index.html --public-url http://liujiacai.net/elisp-demos/",
     "lint": "eslint .",
     "lint:fix": "npm run lint -- --fix"
   },