diff --git a/src/common/utils.py b/src/common/utils.py
index 2a180d2..5db9944 100644
--- a/src/common/utils.py
+++ b/src/common/utils.py
@@ -115,7 +115,7 @@ class MangaDownloader:
         save_path = DirectoryNaming.manga_cover_dir(manga_info)
         DirectoryNaming.ensure_dir(save_path.parent)
         if os.path.exists(save_path):
-            if FileNaming().file_update_by_date(save_path, day=7):
+            if FileNaming().file_update_by_date(save_path, day=30):
                 """需要更新刚删除原文件"""
                 os.remove(save_path)
             else: