diff --git a/packages/core/package.json b/packages/core/package.json
index 60450b151..18e5cd40f 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -51,6 +51,7 @@
     "prebundle": "1.1.0",
     "rslib": "npm:@rslib/core@0.0.2",
     "rslog": "^1.2.2",
+    "type-fest": "^4.24.0",
     "typescript": "^5.5.4"
   },
   "peerDependencies": {
diff --git a/packages/core/src/config.ts b/packages/core/src/config.ts
index 952165746..e9fc18a77 100644
--- a/packages/core/src/config.ts
+++ b/packages/core/src/config.ts
@@ -9,12 +9,12 @@ import {
   mergeRsbuildConfig,
 } from '@rsbuild/core';
 import glob from 'fast-glob';
+import type { PackageJson } from 'type-fest';
 import { DEFAULT_CONFIG_NAME, DEFAULT_EXTENSIONS } from './constant';
 import type {
   AutoExternal,
   Format,
   LibConfig,
-  PkgJson,
   RslibConfig,
   RslibConfigAsyncFn,
   RslibConfigExport,
@@ -89,7 +89,7 @@ export async function loadConfig({
 
 export const composeAutoExternalConfig = (options: {
   autoExternal: AutoExternal;
-  pkgJson?: PkgJson;
+  pkgJson?: PackageJson;
   userExternals?: NonNullable<RsbuildConfig['output']>['externals'];
 }): RsbuildConfig => {
   const { autoExternal, pkgJson, userExternals } = options;
@@ -242,7 +242,7 @@ const composeFormatConfig = (format: Format): RsbuildConfig => {
 const composeAutoExtensionConfig = (
   config: LibConfig,
   autoExtension: boolean,
-  pkgJson?: PkgJson,
+  pkgJson?: PackageJson,
 ): {
   config: RsbuildConfig;
   jsExtension: string;
diff --git a/packages/core/src/types/index.ts b/packages/core/src/types/index.ts
index 235e5fdbc..8af67e874 100644
--- a/packages/core/src/types/index.ts
+++ b/packages/core/src/types/index.ts
@@ -1,2 +1 @@
 export type * from './config';
-export type * from './utils';
diff --git a/packages/core/src/types/utils.ts b/packages/core/src/types/utils.ts
deleted file mode 100644
index 8b3d31293..000000000
--- a/packages/core/src/types/utils.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export type PkgJson = {
-  dependencies?: Record<string, string>;
-  peerDependencies?: Record<string, string>;
-  devDependencies?: Record<string, string>;
-  [key: string]: unknown;
-};
diff --git a/packages/core/src/utils/extension.ts b/packages/core/src/utils/extension.ts
index 7d514a9e9..6fe9925d9 100644
--- a/packages/core/src/utils/extension.ts
+++ b/packages/core/src/utils/extension.ts
@@ -1,9 +1,10 @@
-import type { Format, PkgJson } from '../types';
+import type { PackageJson } from 'type-fest';
+import type { Format } from '../types';
 import { logger } from './logger';
 
 export const getDefaultExtension = (options: {
   format: Format;
-  pkgJson?: PkgJson;
+  pkgJson?: PackageJson;
   autoExtension: boolean;
 }): {
   jsExtension: string;
diff --git a/packages/core/src/utils/helper.ts b/packages/core/src/utils/helper.ts
index 387e20123..f72d06075 100644
--- a/packages/core/src/utils/helper.ts
+++ b/packages/core/src/utils/helper.ts
@@ -2,7 +2,7 @@ import fs from 'node:fs';
 import fsP from 'node:fs/promises';
 import path from 'node:path';
 import color from 'picocolors';
-import type { PkgJson } from '../types';
+import type { PackageJson } from 'type-fest';
 import { logger } from './logger';
 
 /**
@@ -107,7 +107,7 @@ export async function calcLongestCommonPath(
   return lca;
 }
 
-export const readPackageJson = (rootPath: string): undefined | PkgJson => {
+export const readPackageJson = (rootPath: string): undefined | PackageJson => {
   const pkgJsonPath = path.join(rootPath, './package.json');
 
   if (!fs.existsSync(pkgJsonPath)) {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 916a50b2b..f2dbbc7d6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -229,6 +229,9 @@ importers:
       rslog:
         specifier: ^1.2.2
         version: 1.2.2
+      type-fest:
+        specifier: ^4.24.0
+        version: 4.24.0
       typescript:
         specifier: ^5.5.4
         version: 5.5.4
@@ -2420,6 +2423,10 @@ packages:
     resolution: {integrity: sha512-tLq3bSNx+xSpwvAJnzrK0Ep5CLNWjvFTOp71URMaAEWBfRb9nnJiBoUe0tF8bI4ZFO3omgBR6NvnbzVUT3Ly4g==}
     engines: {node: '>=14.16'}
 
+  type-fest@4.24.0:
+    resolution: {integrity: sha512-spAaHzc6qre0TlZQQ2aA/nGMe+2Z/wyGk5Z+Ru2VUfdNwT6kWO6TjevOlpebsATEG1EIQ2sOiDszud3lO5mt/Q==}
+    engines: {node: '>=16'}
+
   type-is@1.6.18:
     resolution: {integrity: sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==}
     engines: {node: '>= 0.6'}
@@ -4754,6 +4761,8 @@ snapshots:
 
   type-fest@3.13.1: {}
 
+  type-fest@4.24.0: {}
+
   type-is@1.6.18:
     dependencies:
       media-typer: 0.3.0