diff --git a/package.json b/package.json
index df6351a433..c4325f2c8e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "egg",
-  "version": "4.0.0-beta.14",
+  "version": "4.0.0-beta.15",
   "engines": {
     "node": ">= 18.19.0"
   },
@@ -21,10 +21,10 @@
   "dependencies": {
     "@eggjs/cluster": "^3.0.0",
     "@eggjs/cookies": "^3.0.0",
-    "@eggjs/core": "^6.2.11",
+    "@eggjs/core": "^6.2.13",
     "@eggjs/schedule": "^5.0.2",
-    "@eggjs/utils": "^4.1.5",
-    "@eggjs/watcher": "^4.0.1",
+    "@eggjs/utils": "^4.2.4",
+    "@eggjs/watcher": "^4.0.3",
     "circular-json-for-egg": "^1.0.0",
     "cluster-client": "^3.7.0",
     "egg-development": "^3.0.0",
diff --git a/src/lib/types.ts b/src/lib/types.ts
index d16b55cf19..f4de59175a 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -7,6 +7,7 @@ import type {
 } from 'egg-logger';
 import type {
   FileLoaderOptions,
+  EggAppConfig as EggCoreAppConfig,
 } from '@eggjs/core';
 import type {
   EggApplicationCore, Context,
@@ -16,7 +17,7 @@ import type { NotFoundMiddlewareOptions } from '../app/middleware/notfound.js';
 import type { SiteFileMiddlewareOptions } from '../app/middleware/site_file.js';
 
 // import @eggjs/watcher types
-// import '@eggjs/watcher';
+import '@eggjs/watcher';
 
 export type {
   EggAppInfo,
@@ -61,7 +62,7 @@ export interface CustomLoaderConfig extends Omit<FileLoaderOptions, 'inject' | '
   loadunit?: boolean;
 }
 
-export interface EggAppConfig {
+export interface EggAppConfig extends EggCoreAppConfig {
   workerStartTimeout: number;
   baseDir: string;
   middleware: string[];
@@ -147,43 +148,43 @@ export interface EggAppConfig {
     useHttpClientNext?: boolean;
   };
 
-  development: {
-    /**
-     * dirs needed watch, when files under these change, application will reload, use relative path
-     */
-    watchDirs: string[];
-    /**
-     * dirs don't need watch, including subdirectories, use relative path
-     */
-    ignoreDirs: string[];
-    /**
-     * don't wait all plugins ready, default is true.
-     */
-    fastReady: boolean;
-    /**
-     * whether reload on debug, default is true.
-     */
-    reloadOnDebug: boolean;
-    /**
-     * whether override default watchDirs, default is false.
-     */
-    overrideDefault: boolean;
-    /**
-     * whether override default ignoreDirs, default is false.
-     */
-    overrideIgnore: boolean;
-    /**
-     * whether to reload, use https://github.com/sindresorhus/multimatch
-     */
-    reloadPattern: string[] | string;
-  };
+  // development: {
+  //   /**
+  //    * dirs needed watch, when files under these change, application will reload, use relative path
+  //    */
+  //   watchDirs: string[];
+  //   /**
+  //    * dirs don't need watch, including subdirectories, use relative path
+  //    */
+  //   ignoreDirs: string[];
+  //   /**
+  //    * don't wait all plugins ready, default is true.
+  //    */
+  //   fastReady: boolean;
+  //   /**
+  //    * whether reload on debug, default is true.
+  //    */
+  //   reloadOnDebug: boolean;
+  //   /**
+  //    * whether override default watchDirs, default is false.
+  //    */
+  //   overrideDefault: boolean;
+  //   /**
+  //    * whether override default ignoreDirs, default is false.
+  //    */
+  //   overrideIgnore: boolean;
+  //   /**
+  //    * whether to reload, use https://github.com/sindresorhus/multimatch
+  //    */
+  //   reloadPattern: string[] | string;
+  // };
 
   /**
    * customLoader config
    */
-  customLoader: {
-    [key: string]: CustomLoaderConfig;
-  };
+  // customLoader: {
+  //   [key: string]: CustomLoaderConfig;
+  // };
 
   /**
    * It will ignore special keys when dumpConfig
@@ -308,8 +309,6 @@ export interface EggAppConfig {
     allowedMethods: string[];
   };
 
-  watcher: Record<string, any>;
-
   onClientError?(err: Error, socket: Socket, app: EggApplicationCore): ClientErrorResponse | Promise<ClientErrorResponse>;
 
   /**
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 597863c8d4..79bea5b1a7 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -1,4 +1,3 @@
-
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 
diff --git a/test/index.test-d.ts b/test/index.test-d.ts
index d5f6e0fb83..052473eb5c 100644
--- a/test/index.test-d.ts
+++ b/test/index.test-d.ts
@@ -18,6 +18,10 @@ expectType<Context>(ctx);
 expectType<HttpClient>(ctx.httpClient);
 expectType<any>(ctx.request.body);
 
+expectType<object>(app.watcher);
+expectType<string>(app.config.watcher.type);
+expectType<string>(app.config.watcher.eventSources.default);
+
 class AppBoot implements ILifecycleBoot {
   private readonly app: Application;