diff --git a/packages/frontend/src/custom-emojis.ts b/packages/frontend/src/custom-emojis.ts
index 4009ed703..95241fb8e 100644
--- a/packages/frontend/src/custom-emojis.ts
+++ b/packages/frontend/src/custom-emojis.ts
@@ -8,7 +8,7 @@ import * as Misskey from 'misskey-js';
 import { misskeyApi, misskeyApiGet } from '@/scripts/misskey-api.js';
 import { get, set } from '@/scripts/idb-proxy.js';
 
-const CACHE_EXPIRE_TIME = 60 * 60 * 1000;
+const CACHE_EXPIRE_TIME = 12 * 60 * 60 * 1000;
 const BATCH_SIZE = 1000;
 
 const storageCache = await get('emojis');