8888 port not working on my mac

backend/src/main/resources/application.properties

@@ -1,6 +1,6 @@
 spring.application.name=metersphere
 
-server.port=8888
+server.port=8081
 
 # Hikari
 spring.datasource.type=com.zaxxer.hikari.HikariDataSource

frontend/vue.config.js

@@ -6,7 +6,7 @@ module.exports = {
     devServer: {
         proxy: {
             ['^(?!/login)']: {
-                target: 'http://localhost:8888',
+                target: 'http://localhost:8081',
                 ws: true,
             }
         }
@@ -23,4 +23,4 @@ module.exports = {
             filename: "login.html"
         }
     }
-};
+};