diff --git a/Makefile b/Makefile
index 9cf2e233..a55dbf3a 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,7 @@
 default: help
 
 # build all theme
-build-theme: build-theme-default
-
-build-theme-default:
+build-theme:
 	npm run build:theme
 
 install:
diff --git a/examples/assets/images/guide.png b/examples/assets/images/guide.png
index 8fbefe48..6957d386 100644
Binary files a/examples/assets/images/guide.png and b/examples/assets/images/guide.png differ
diff --git a/packages/upload/src/ajax.js b/packages/upload/src/ajax.js
index fb4c7d73..ac07a14e 100644
--- a/packages/upload/src/ajax.js
+++ b/packages/upload/src/ajax.js
@@ -20,17 +20,6 @@ function getBody(xhr) {
   }
 }
 
-// option {
-//  onProgress: (event: { percent: number }): void,
-//  onError: (event: Error, body?: Object): void,
-//  onSuccess: (body: Object): void,
-//  data: Object,
-//  filename: String,
-//  file: File,
-//  withCredentials: Boolean,
-//  action: String,
-//  headers: Object,
-// }
 export default function upload(action, option) {
   if (typeof XMLHttpRequest === 'undefined') {
     return;
@@ -61,8 +50,6 @@ export default function upload(action, option) {
   };
 
   xhr.onload = function onload() {
-    // allow success when 2xx status
-    // see https://github.com/react-component/upload/issues/34
     if (xhr.status < 200 || xhr.status >= 300) {
       return option.onError(getError(action, option, xhr), getBody(xhr));
     }
@@ -72,19 +59,12 @@ export default function upload(action, option) {
 
   xhr.open('post', action, true);
 
-  // Has to be after `.open()`. See https://github.com/enyo/dropzone/issues/179
   if (option.withCredentials && 'withCredentials' in xhr) {
     xhr.withCredentials = true;
   }
 
   const headers = option.headers || {};
 
-  // when set headers['X-Requested-With'] = null , can close default XHR header
-  // see https://github.com/react-component/upload/issues/33
-  // if (headers['X-Requested-With'] !== null) {
-  //   xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
-  // }
-
   for (let item in headers) {
     if (headers.hasOwnProperty(item) && headers[item] !== null) {
       xhr.setRequestHeader(item, headers[item]);