diff --git a/src/common/annotation-manager.js b/src/common/annotation-manager.js
index d7f1cfb7..183d9210 100644
--- a/src/common/annotation-manager.js
+++ b/src/common/annotation-manager.js
@@ -6,8 +6,8 @@ import { postApi } from '../custom/utils/apiFetch'
 
 let api = '';
 if (process.env.NODE_ENV === 'development'){
-	//api = 'https://be.yeondoo.net'
-	api = 'https://virtserver.swaggerhub.com/SYLEELSW_1/Yeondoo/2.0'
+	api = 'https://be.yeondoo.net'
+	//api = 'https://virtserver.swaggerhub.com/SYLEELSW_1/Yeondoo/2.0'
 }
 else if (process.env.NODE_ENV === 'production'){
 	api = `${process.env.VITE_REACT_APP_AWS_SERVER}`
diff --git a/src/index.dev.js b/src/index.dev.js
index c6ca7ea9..a1480268 100644
--- a/src/index.dev.js
+++ b/src/index.dev.js
@@ -10,8 +10,8 @@ window.dev = true;
 
 let api = '';
 if (process.env.NODE_ENV === 'development'){
-	//api = 'https://be.yeondoo.net'
-	api = 'https://virtserver.swaggerhub.com/SYLEELSW_1/Yeondoo/2.0'
+	api = 'https://be.yeondoo.net'
+	//api = 'https://virtserver.swaggerhub.com/SYLEELSW_1/Yeondoo/2.0'
 }
 else if (process.env.NODE_ENV === 'production'){
 	api = `${process.env.VITE_REACT_APP_AWS_SERVER}`
@@ -70,6 +70,10 @@ const receiveBasicInfo = async(e) => {
 		
 		//createReader(paperId, [...paperItemsWithTag, e.data.chatNote])
 	}
+	// if (e.data.needPaperIndex) {
+	// 	reader.
+	// 	window.parent.postMessage({pageIndex: 0}, '*')
+	// }
 }
 
 window.addEventListener("message", receiveBasicInfo);
@@ -155,6 +159,9 @@ async function createReader(paperId, paperItems) {
 			console.log('Delete annotations', JSON.stringify(ids));
 		},
 		onChangeViewState: function (state, primary) {
+			if (state){
+				window.parent.postMessage({pageIndex: state.pageIndex}, '*')
+			}
 			console.log('Set state', state, primary);
 		},
 		onOpenTagsPopup(annotationID, left, top) {