diff --git a/src/bot/skin/github-notification-query.ts b/src/bot/skin/github-notification-query.ts
index 97e2208..d95f6c9 100644
--- a/src/bot/skin/github-notification-query.ts
+++ b/src/bot/skin/github-notification-query.ts
@@ -1,7 +1,7 @@
+import fetch, { FetchError } from "node-fetch";
 import { GitHubNotifications } from "../exp/github-notification";
 import { GitHubUser } from "../exp/github-user";
 import { Query } from "../play/notify";
-import fetch from "node-fetch";
 
 export const notificationQuery: Query = {
   async fetchNotification({
@@ -11,14 +11,21 @@ export const notificationQuery: Query = {
     const base64 = Buffer.from(`${userName}:${notificationToken}`).toString(
       "base64",
     );
-    const rawRes = await fetch("https://api.github.com/notifications", {
-      headers: {
-        Authorization: `Basic ${base64}`,
-      },
-    });
-    if (!rawRes.ok) {
-      throw new Error("fail to fetch notifications");
+    try {
+      const rawRes = await fetch("https://api.github.com/notifications", {
+        headers: {
+          Authorization: `Basic ${base64}`,
+        },
+      });
+      if (!rawRes.ok) {
+        return [];
+      }
+      return [...((await rawRes.json()) as unknown[])] as GitHubNotifications;
+    } catch (err: unknown) {
+      if (err instanceof FetchError) {
+        return [];
+      }
+      throw err;
     }
-    return [...((await rawRes.json()) as unknown[])] as GitHubNotifications;
   },
 };