diff --git a/webpack/lib/authentication.js b/webpack/lib/authentication.js
index 94b7dd6..110f7f3 100644
--- a/webpack/lib/authentication.js
+++ b/webpack/lib/authentication.js
@@ -10,7 +10,7 @@ export default class Authentication{
 	constructor(){
 
 		/* (1) Default localStorage Interface */
-		this.lsi = new LocalStorageInterface('__auth__', 5*60);
+		this.lsi = new LocalStorageInterface('__auth__', 15*60);
 
 		/* (2) Update token */
 		if( this.token !== null && this.user !== null ){