diff --git a/blog.config.js b/blog.config.js
index a6f06c4f..6c22adf3 100644
--- a/blog.config.js
+++ b/blog.config.js
@@ -11,7 +11,7 @@ const BLOG = {
 
   LANG: 'zh-CN', // e.g 'zh-CN','en-US'  see /lib/lang.js for more.
   SINCE: 2021, // e.g if leave this empty, current year will be used.
-  BEI_AN: '', // 备案号 闽ICP备XXXXXXX
+  BEI_AN: process.env.NEXT_PUBLIC_BEI_AN || '', // 备案号 闽ICP备XXXXXXX
   APPEARANCE: 'auto', // ['light', 'dark', 'auto'],
   FONT: 'font-serif tracking-wider subpixel-antialiased', // 文章字体 ['font-sans', 'font-serif', 'font-mono'] @see https://www.tailwindcss.cn/docs/font-family
   BACKGROUND_LIGHT: '#eeeeee', // use hex value, don't forget '#' e.g #fffefc