diff --git a/build/build-readme.ts b/build/build-readme.ts
index 2b06536..f8e32fa 100644
--- a/build/build-readme.ts
+++ b/build/build-readme.ts
@@ -17,7 +17,7 @@ const projs = glob
 
 const readmeAbsPaths = projs.map((p) => path.resolve(p, 'readme.md'));
 
-const readmeRelPaths = readmeAbsPaths.map((p) => path.relative(rootDir, p));
+const readmeRelPaths = projs.map((p) => path.relative(rootDir, p));
 
 const titles = readmeAbsPaths.map(
   (p) => fs.readFileSync(p, 'utf8').match(/(?<=(^#\s)).*(?=\n)/)![0],
diff --git a/readme.md b/readme.md
index 9eb8942..6d3ecbf 100644
--- a/readme.md
+++ b/readme.md
@@ -6,19 +6,19 @@
 
 <!-- demo start -->
 
-- [0 编译 JS 文件](demo/0-basic-single-js/readme.md)
-- [1 打包 HTML+JS](demo/1-basic-with-html/readme.md)
-- [2 dev-server 即时预览](demo/2-basic-dev-server-and-hot-reload/readme.md)
-- [3 打包 HTML+JS+CSS](demo/3-basic-html-js-css/readme.md)
-- [4 用 webpack-chain 重构打包配置](demo/4-webpack-chain/readme.md)
-- [5 用 TypeScript 重构打包配置](demo/5-refactor-config-with-ts/readme.md)
-- [6 Scss、Less、CSS](demo/6-more-style/readme.md)
-- [7 Babel 基本, 用 TypeScript 写业务代码](demo/7-babel-basic/readme.md)
-- [8 代码压缩配置](demo/8-minify-and-restructure-configs/readme.md)
-- [9 Dynamic Import](demo/9-dynamic-import/readme.md)
-- [10 Let's: Polyfill](demo/10-webpack-babel-polyfill-basic/readme.md)
-- [11 Let's: Polyfill + async](demo/11-polyfill-and-async/readme.md)
-- [12 Let's: Tree Shaking](demo/12-tree-shaking/readme.md)
+- [0 编译 JS 文件](demo/0-basic-single-js)
+- [1 打包 HTML+JS](demo/1-basic-with-html)
+- [2 dev-server 即时预览](demo/2-basic-dev-server-and-hot-reload)
+- [3 打包 HTML+JS+CSS](demo/3-basic-html-js-css)
+- [4 用 webpack-chain 重构打包配置](demo/4-webpack-chain)
+- [5 用 TypeScript 重构打包配置](demo/5-refactor-config-with-ts)
+- [6 Scss、Less、CSS](demo/6-more-style)
+- [7 Babel 基本, 用 TypeScript 写业务代码](demo/7-babel-basic)
+- [8 代码压缩配置](demo/8-minify-and-restructure-configs)
+- [9 Dynamic Import](demo/9-dynamic-import)
+- [10 Let's: Polyfill](demo/10-webpack-babel-polyfill-basic)
+- [11 Let's: Polyfill + async](demo/11-polyfill-and-async)
+- [12 Let's: Tree Shaking](demo/12-tree-shaking)
 
 <!-- demo end -->