diff --git a/app/extend/application.js b/app/extend/application.js
new file mode 100644
index 0000000..9645685
--- /dev/null
+++ b/app/extend/application.js
@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = {
+  async createOss(...args) {
+    return await this.oss.createInstanceAsync.call(this.oss, ...args);
+  },
+};
diff --git a/lib/oss.js b/lib/oss.js
index 0232ced..64559a9 100644
--- a/lib/oss.js
+++ b/lib/oss.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const assert = require('assert');
+const is = require('is-type-of');
 const OSS = require('ali-oss');
 const STS = OSS.STS;
 const ClusterClient = OSS.ClusterClient;
@@ -13,8 +14,12 @@ function checkBucketConfig(config) {
 }
 
 module.exports = app => {
-  app.addSingleton('oss', (config, app) => {
+  app.addSingleton('oss', async (config, app) => {
     config = Object.assign({}, config, { urllib: app.httpclient });
+    if (is.function(config.loadConfig)) {
+      const result = config.loadConfig(config, app);
+      config = is.promise(result) ? (await result) : result;
+    }
     if (config.cluster) {
       config.cluster.forEach(checkBucketConfig);
       return new ClusterClient(config);
@@ -27,5 +32,4 @@ module.exports = app => {
     checkBucketConfig(config);
     return new OSS(config);
   });
-  app.createOss = app.oss.createInstance.bind(app.oss);
 };
diff --git a/package.json b/package.json
index e6c1f4a..cb39f59 100644
--- a/package.json
+++ b/package.json
@@ -19,16 +19,17 @@
     "oss"
   ],
   "dependencies": {
-    "ali-oss": "^6.0.1"
+    "ali-oss": "^6.1.1",
+    "is-type-of": "^1.2.1"
   },
   "devDependencies": {
-    "autod": "^3.0.1",
+    "autod": "^3.1.0",
     "dotenv": "^6.1.0",
-    "egg": "^2.11.2",
-    "egg-bin": "^4.9.0",
-    "egg-mock": "^3.20.1",
-    "eslint": "^5.6.1",
-    "eslint-config-egg": "^7.1.0",
+    "egg": "^2.22.2",
+    "egg-bin": "^4.13.0",
+    "egg-mock": "^3.23.1",
+    "eslint": "^6.0.0",
+    "eslint-config-egg": "^7.4.1",
     "is-type-of": "^1.2.1"
   },
   "engines": {
diff --git a/test/fixtures/apps/oss-async-load/app/router.js b/test/fixtures/apps/oss-async-load/app/router.js
new file mode 100644
index 0000000..d362142
--- /dev/null
+++ b/test/fixtures/apps/oss-async-load/app/router.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const fs = require('fs');
+
+module.exports = function(app) {
+  app.get('/uploadtest', async ctx => {
+    const name = 'oss-test-upload-' + process.version + '-' + Date.now();
+    ctx.body = await ctx.oss.put(name, fs.createReadStream(__filename));
+  });
+};
diff --git a/test/fixtures/apps/oss-async-load/config/config.default.js b/test/fixtures/apps/oss-async-load/config/config.default.js
new file mode 100644
index 0000000..75aad6d
--- /dev/null
+++ b/test/fixtures/apps/oss-async-load/config/config.default.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const assert = require('assert');
+
+exports.keys = '123';
+exports.oss = {
+  default: {
+    async loadConfig(config, app) {
+      assert(app && app.name === 'oss-async-load');
+      return Object.assign({}, require('../../../../config'), config);
+    },
+  },
+  client: {},
+};
diff --git a/test/fixtures/apps/oss-async-load/package.json b/test/fixtures/apps/oss-async-load/package.json
new file mode 100644
index 0000000..a5badf6
--- /dev/null
+++ b/test/fixtures/apps/oss-async-load/package.json
@@ -0,0 +1,3 @@
+{
+  "name": "oss-async-load"
+}
diff --git a/test/fixtures/apps/oss-not-init/app.js b/test/fixtures/apps/oss-not-init/app.js
index b6b625f..533d7f9 100644
--- a/test/fixtures/apps/oss-not-init/app.js
+++ b/test/fixtures/apps/oss-not-init/app.js
@@ -1,5 +1,7 @@
 'use strict';
 
 module.exports = function(app) {
-  app.uploader = app.createOss(app.config.uploader);
+  app.beforeStart(async () => {
+    app.uploader = await app.createOss(app.config.uploader);
+  });
 };
diff --git a/test/oss.test.js b/test/oss.test.js
index 5170ac6..4ccec34 100644
--- a/test/oss.test.js
+++ b/test/oss.test.js
@@ -292,4 +292,33 @@ describe('test/oss.test.js', () => {
     });
   });
 
+  describe('oss async load config', () => {
+    let app;
+    let lastUploadFileName;
+    before(async () => {
+      app = mm.app({
+        baseDir: 'apps/oss-async-load',
+      });
+      await app.ready();
+    });
+    after(async () => {
+      if (lastUploadFileName) {
+        await app.oss.delete(lastUploadFileName);
+      }
+      await app.close();
+    });
+
+    it('should upload file stream to oss', async () => {
+      await app.httpRequest()
+        .get('/uploadtest')
+        .expect(function(res) {
+          lastUploadFileName = res.body.name;
+          assert(typeof res.body.name === 'string');
+          assert(/^https?:\/\/egg\-oss\-unittest\.\w+/.test(res.body.url));
+          assert(res.body.res.status === 200);
+        })
+        .expect(200);
+    });
+  });
+
 });