you can replace default path /socket.io with yours

config like:
Vue.use(VueSocketio, {url: 'http://localhost:3000', path: '/your_path'});
and you can set namespace the sametime:
Vue.use(VueSocketio, {url: 'http://localhost:3000/namespace', path: '/your_path'});
all these above will create the connect like: 
ws://localhost:3000/your_path/...

src/Observer.js

@@ -7,6 +7,8 @@ export default class{
 
         if(typeof connection == 'string'){
             this.Socket = Socket(connection);
+        }else if(connection.url){
+            this.Socket = Socket(connection.url, {path: connection.path ? connection.path : '/socket.io'});
         }else{
             this.Socket = connection
         }