diff --git a/app/core/cache.py b/app/core/cache.py
index a198af46..ea627d3e 100644
--- a/app/core/cache.py
+++ b/app/core/cache.py
@@ -1130,7 +1130,7 @@ class TTLCache(CacheProxy):
     使用项目的缓存后端实现，支持 Redis 和内存缓存
     """
 
-    def __init__(self, maxsize: int = 128, ttl: int = 600, region: Optional[str] = None):
+    def __init__(self, maxsize: int = 1024, ttl: int = 600, region: Optional[str] = None):
         """
         初始化 TTL 缓存
 
@@ -1138,10 +1138,7 @@ class TTLCache(CacheProxy):
         :param ttl: 缓存的存活时间，单位秒
         :param region: 缓存的区，为 None 时使用默认区
         """
-        self.maxsize = maxsize
-        self.ttl = ttl
-        cache_backend = Cache(maxsize=maxsize, ttl=ttl)
-        super().__init__(cache_backend, region or DEFAULT_CACHE_REGION, ttl)
+        super().__init__(Cache(maxsize=maxsize, ttl=ttl), region or DEFAULT_CACHE_REGION, ttl)
 
 
 class LRUCache(CacheProxy):
@@ -1157,6 +1154,4 @@ class LRUCache(CacheProxy):
         :param maxsize: 缓存的最大条目数
         :param region: 缓存的区，为 None 时使用默认区
         """
-        self.maxsize = maxsize
-        cache_backend = Cache(maxsize=maxsize)
-        super().__init__(cache_backend, region or DEFAULT_CACHE_REGION)
+        super().__init__(Cache(maxsize=maxsize), region or DEFAULT_CACHE_REGION)
diff --git a/app/helper/torrent.py b/app/helper/torrent.py
index 4b4d372f..08829ca6 100644
--- a/app/helper/torrent.py
+++ b/app/helper/torrent.py
@@ -7,6 +7,7 @@ from urllib.parse import unquote
 from torrentool.api import Torrent
 
 from app.core.cache import FileCache
+from app.core.cache import TTLCache
 from app.core.config import settings
 from app.core.context import Context, TorrentInfo, MediaInfo
 from app.core.meta import MetaBase
@@ -25,7 +26,7 @@ class TorrentHelper:
     """
 
     def __init__(self):
-        self._invalid_torrents = []
+        self._invalid_torrents = TTLCache(maxsize=128, ttl=3600 * 24)
 
     def download_torrent(self, url: str,
                          cookie: Optional[str] = None,
@@ -351,7 +352,7 @@ class TorrentHelper:
         添加无效种子
         """
         if url not in self._invalid_torrents:
-            self._invalid_torrents.append(url)
+            self._invalid_torrents[url] = True
 
     @staticmethod
     def match_torrent(mediainfo: MediaInfo, torrent_meta: MetaBase, torrent: TorrentInfo) -> bool: