diff --git a/lib/bull.js b/lib/bull.js
index d76f006..38c9069 100644
--- a/lib/bull.js
+++ b/lib/bull.js
@@ -1,7 +1,6 @@
 'use strict';
 
 const assert = require('assert');
-const Queue = require('bull');
 
 module.exports = app => {
   app.addSingleton('bull', createQueue);
@@ -15,6 +14,7 @@ function createQueue(config, app) {
     '[egg-bull] host and port of redis are required on config'
   );
 
+  const Queue = app.config.bull.Bull || require('bull');
   const queue = new Queue(name, config);
 
   /* istanbul ignore next */