diff --git a/app_web.py b/app_web.py
index 61260d0..5bc4297 100644
--- a/app_web.py
+++ b/app_web.py
@@ -624,8 +624,9 @@ def compute_storage_stats(base: Path, days: int, keyword_list: Tuple[str, ...])
     kw_params = [f"%{k}%" for k in keyword_list]
 
     for channel_id, path in dbs:
-        conn = sqlite3.connect(str(path))
+        conn = sqlite3.connect(str(path), timeout=60.0)
         try:
+            conn.execute("PRAGMA busy_timeout=60000")
             cur_sql = conn.cursor()
             cur_sql.execute("SELECT COUNT(*) FROM messages")
             total_all_time += int(cur_sql.fetchone()[0])
diff --git a/telegram-scraper.py b/telegram-scraper.py
index d40c665..91f8496 100644
--- a/telegram-scraper.py
+++ b/telegram-scraper.py
@@ -438,7 +438,9 @@ class OptimizedTelegramScraper:
             channel_dir.mkdir(exist_ok=True)
 
             db_file = channel_dir / f'{channel}.db'
-            conn = sqlite3.connect(str(db_file), check_same_thread=False)
+            # 多频道轮询写入时适当延长等待，减轻与其它进程/备份工具短暂抢锁时的 OperationalError
+            conn = sqlite3.connect(str(db_file), check_same_thread=False, timeout=60.0)
+            conn.execute("PRAGMA busy_timeout=60000")
             conn.execute('''CREATE TABLE IF NOT EXISTS messages
                           (id INTEGER PRIMARY KEY, message_id INTEGER UNIQUE, date TEXT,
                            sender_id INTEGER, first_name TEXT, last_name TEXT, username TEXT,