diff --git a/packages/@vuepress/types/index.d.ts b/packages/@vuepress/types/index.d.ts
new file mode 100644
index 0000000000..f7f629ec60
--- /dev/null
+++ b/packages/@vuepress/types/index.d.ts
@@ -0,0 +1,31 @@
+import {
+  UserConfig,
+  ThemeConfig,
+  DefaultThemeConfig,
+  ThemeEntry
+} from './lib'
+
+export * from './lib'
+
+/**
+ * A helper function to define VuePress config file.
+ *
+ * @see https://vuepress.vuejs.org/config/
+ */
+export function defineConfig(config: UserConfig<DefaultThemeConfig>): void;
+
+/**
+ * A helper function to define VuePress config file, for custom theme.
+ *
+ * @see https://vuepress.vuejs.org/config/
+ */
+export function defineConfig4CustomTheme<T extends ThemeConfig = ThemeConfig>(
+  config: UserConfig<T>
+): void;
+
+/**
+ * A helper function to define VuePress theme entry file.
+ *
+ * @see https://vuepress.vuejs.org/theme/option-api.html
+ */
+export function defineThemeEntry(config: ThemeEntry): void;
diff --git a/packages/@vuepress/types/index.js b/packages/@vuepress/types/index.js
new file mode 100644
index 0000000000..7d9ae61e6d
--- /dev/null
+++ b/packages/@vuepress/types/index.js
@@ -0,0 +1,6 @@
+function define(config) {
+  config;
+}
+exports.defineConfig = define;
+exports.defineConfig4CustomTheme = define;
+exports.defineThemeEntry = define;
diff --git a/packages/@vuepress/types/package.json b/packages/@vuepress/types/package.json
index 308b5de7ba..68826f468e 100644
--- a/packages/@vuepress/types/package.json
+++ b/packages/@vuepress/types/package.json
@@ -20,7 +20,8 @@
   },
   "license": "MIT",
   "author": "ULIVZ",
-  "types": "lib/index.ts",
+  "main": "index.js",
+  "types": "index.d.ts",
   "dependencies": {
     "webpack-chain": "^6.0.0"
   },
diff --git a/packages/vuepress/config.d.ts b/packages/vuepress/config.d.ts
index 84829078de..8accc4911f 100644
--- a/packages/vuepress/config.d.ts
+++ b/packages/vuepress/config.d.ts
@@ -1,31 +1 @@
-import {
-  UserConfig,
-  ThemeConfig,
-  DefaultThemeConfig,
-  ThemeEntry
-} from '@vuepress/types'
-
 export * from '@vuepress/types'
-
-/**
- * A helper function to define VuePress config file.
- *
- * @see https://vuepress.vuejs.org/config/
- */
-export function defineConfig(config: UserConfig<DefaultThemeConfig>): void;
-
-/**
- * A helper function to define VuePress config file, for custom theme.
- *
- * @see https://vuepress.vuejs.org/config/
- */
-export function defineConfig4CustomTheme<T extends ThemeConfig = ThemeConfig>(
-  config: UserConfig<T>
-): void;
-
-/**
- * A helper function to define VuePress theme entry file.
- *
- * @see https://vuepress.vuejs.org/theme/option-api.html
- */
-export function defineThemeEntry(config: ThemeEntry): void;
diff --git a/packages/vuepress/config.js b/packages/vuepress/config.js
index e9aff7a4b3..51cce319d2 100644
--- a/packages/vuepress/config.js
+++ b/packages/vuepress/config.js
@@ -1,6 +1 @@
-function define (config) {
-  config
-}
-exports.defineConfig = define
-exports.defineConfig4CustomTheme = define
-exports.defineThemeEntry = define
+module.exports = require('@vuepress/types')