diff --git a/bower.json b/bower.json
index 202ec03..89d002f 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "upyun",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "authors": [
     "turing <o.u.turing@gmail.com>"
   ],
diff --git a/package.json b/package.json
index 9127f74..ee08321 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "upyun-form",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "a pure front-end upyun form upload service, supports both native js and angular.js",
   "main": "src/upyun.js",
   "directories": {
diff --git a/src/upyun.js b/src/upyun.js
index 9f798c3..b87c5c1 100644
--- a/src/upyun.js
+++ b/src/upyun.js
@@ -6,6 +6,7 @@
   if (!window.JSON) throw new Error('JSON required.');
   if (!window.FormData) throw new Error('FormData required.');
   if (!window.XMLHttpRequest) throw new Error('XMLHttpRequest required.');
+  var NProgressExist = NProgress && NProgress.start && NProgress.done;
 
   // inject as a angular module
   if (angular) {
@@ -87,6 +88,7 @@
 
     // when server response
     req.addEventListener('load', function(result) {
+      if (NProgressExist) NProgress.done();
       var statusCode = result.target.status;
       // trying to parse JSON
       if (statusCode !== 200)
@@ -111,6 +113,9 @@
 
     // send data to server 
     req.send(data);
+
+    // ui trigger
+    if (NProgressExist) NProgress.start();
   };
 
 })(window, window.angular);