diff --git a/src/common/UrlTool2.js b/src/common/UrlTool2.js
index ca7d03f26..7042e1475 100644
--- a/src/common/UrlTool2.js
+++ b/src/common/UrlTool2.js
@@ -1,4 +1,4 @@
-export const queryString = {
+const queryString = {
 	stringify: function(params) {
 		let paramsUrl = '';
 	  	for (let key in params) {
@@ -47,4 +47,5 @@ export const queryString = {
 	        ./node_modules/_query-string@6.1.0@query-string/index.js:8
 
 	Read more here: http://bit.ly/2tRViJ9
-*/
\ No newline at end of file
+*/
+export default queryString
\ No newline at end of file
diff --git a/src/common/educoder.js b/src/common/educoder.js
index 5cf06f726..96896845a 100644
--- a/src/common/educoder.js
+++ b/src/common/educoder.js
@@ -11,7 +11,7 @@ export {
 } from './UrlTool';
 
 export { setmiyah as setmiyah } from './Component';
-export { queryString } from './UrlTool2';
+export { default as queryString } from './UrlTool2';
 
 export { SnackbarHOC as SnackbarHOC } from './SnackbarHOC';
 
@@ -68,7 +68,7 @@ export { default as ActionBtn } from './course/ActionBtn'
 
 export { default as MarkdownToHtml } from './components/markdown/MarkdownToHtml'
 
-// export { default as QuillForEditor } from './quillForEditor'
+export { default as QuillForEditor } from './quillForEditor'
 
 export { default as Clappr } from './components/media/Clappr'
 export { default as AliyunUploader } from './components/media/AliyunUploader'