diff --git a/frontend/ts/index.ts b/frontend/ts/index.ts
index 48c4043..ea4f98b 100644
--- a/frontend/ts/index.ts
+++ b/frontend/ts/index.ts
@@ -9,7 +9,8 @@ import { AdapterElement } from "./adapter-element"
 import { ThreadSummaryElement } from "./thread-summary-element"
 
 function main()  {
-  Settings._instance = <Settings>JSON.parse(localStorage.getItem("settings") ?? "{}");
+  const saveData = localStorage.getItem("settings");
+  Settings._instance = saveData ? <Settings>JSON.parse(saveData) : new Settings();
   
   customElements.define("underbbs-tabbar", TabBarElement);
   customElements.define("underbbs-message", MessageElement);