diff --git a/README.md b/README.md
index 12c4faf..9b862d3 100644
--- a/README.md
+++ b/README.md
@@ -33,9 +33,6 @@
   </a>
 </p>
 
-## Online Demo
-Deployed site: [https://log.casbin.com/](https://log.casbin.com/)
-
 ## Architecture
 Casvisor contains 2 parts:
 Name | Description | Language | Source code
@@ -83,7 +80,7 @@ After creating an organization and an application for Casvisor in a Casdoor, you
 
 #### Setup your Casvisor to enable some third-party login platform
 
-  Casvisor uses Casdoor to manage members. If you want to log in with oauth, you should see [casdoor oauth configuration](https://casdoor.org/docs/provider/OAuth).
+  Casvisor uses Casdoor to manage members. If you want to log in with oauth, you should see [casdoor oauth configuration](https://casdoor.org/docs/provider/oauth/overview).
 
 #### OSS, Mail, and SMS services
 
@@ -95,4 +92,4 @@ For Casvisor, if you have any questions, you can give Issues, or you can also di
 
 ## License
 
-[Apache-2.0](https://github.com/casvisor/casvisor/blob/master/LICENSE)
\ No newline at end of file
+[Apache-2.0](LICENSE)
diff --git a/web/src/App.js b/web/src/App.js
index 2b45c96..ea8c6bc 100644
--- a/web/src/App.js
+++ b/web/src/App.js
@@ -285,7 +285,7 @@ class App extends Component {
 
   renderFooter() {
     // How to keep your footer where it belongs ?
-    // https://www.freecodecamp.org/neyarnws/how-to-keep-your-footer-where-it-belongs-59c6aa05c59c/
+    // https://www.freecodecamp.org/news/how-to-keep-your-footer-where-it-belongs-59c6aa05c59c/
 
     return (
       <Footer id="footer" style={
diff --git a/web/src/index.css b/web/src/index.css
index 6b07328..ae77fda 100644
--- a/web/src/index.css
+++ b/web/src/index.css
@@ -38,7 +38,7 @@ code {
   background: #ffccc7;
 }
 
-/*http://react-china.org/t/topic/33846/3*/
+/* http://react-china.org/t/topic/33846/3 */
 .ant-table-header {
   scrollbar-color:transparent transparent
 }
diff --git a/web/src/index.js b/web/src/index.js
index b3b9c39..3872f7a 100644
--- a/web/src/index.js
+++ b/web/src/index.js
@@ -1,5 +1,5 @@
 // create-react-app + IE9
-// https://www.cnblogs.com/xuexia/p/12092768.html
+// https://www.cnblogs.com/yeduweichengzhaoyu/p/12092768.html
 // react-app-polyfill
 // https://www.npmjs.com/package/react-app-polyfill
 import 'react-app-polyfill/ie9';