diff --git a/agent.js b/agent.js
index 92b0d38..4551bfb 100644
--- a/agent.js
+++ b/agent.js
@@ -1,5 +1,16 @@
 'use strict';
 
-module.exports = agent => {
-  require('./lib/loader')(agent);
-};
+class AgentBootHook {
+
+  constructor(agent) {
+    this.agent = agent;
+  }
+
+  async didLoad() {
+    // 请将你的插件项目中 app.beforeStart 中的代码置于此处。
+    await require('./lib/loader')(this.agent);
+  }
+
+}
+
+module.exports = AgentBootHook;
diff --git a/app.js b/app.js
index 1d56502..8a52604 100644
--- a/app.js
+++ b/app.js
@@ -1,6 +1,16 @@
 'use strict';
 
-module.exports = app => {
-  require('./lib/loader')(app);
-};
+class AppBootHook {
 
+  constructor(app) {
+    this.app = app;
+  }
+
+  async didLoad() {
+    // 请将你的插件项目中 app.beforeStart 中的代码置于此处。
+    await require('./lib/loader')(this.app);
+  }
+
+}
+
+module.exports = AppBootHook;
\ No newline at end of file
diff --git a/lib/loader.js b/lib/loader.js
index 22eba2f..990ae50 100644
--- a/lib/loader.js
+++ b/lib/loader.js
@@ -36,9 +36,9 @@ module.exports = app => {
     });
   }
 
-  app.beforeStart(async () => {
-    await Promise.all(databases.map(database => authenticate(database)));
-  });
+  // app.beforeStart(async () => {
+  return Promise.all(databases.map(database => authenticate(database)));
+  // });
 
   /**
    * load databse to app[config.delegate