diff --git a/plugins/system/sign_all.py b/plugins/system/sign_all.py
index 10cc5f7b..55e51126 100644
--- a/plugins/system/sign_all.py
+++ b/plugins/system/sign_all.py
@@ -1,5 +1,6 @@
 import asyncio
 import datetime
+import secrets
 
 from aiohttp import ClientConnectorError
 from genshin import InvalidCookies, AlreadyClaimed, GenshinException
@@ -28,6 +29,7 @@ class SignAll(Plugin):
         self.sign_service = sign_service
         self.cookies_service = cookies_service
         self.user_service = user_service
+        self.random = secrets.SystemRandom()
 
     @handler(CommandHandler, command="sign_all", block=False)
     @bot_admins_rights_check
@@ -66,7 +68,7 @@ class SignAll(Plugin):
             try:
                 if "今天旅行者已经签到过了~" not in text:
                     await context.bot.send_message(sign_db.chat_id, text, parse_mode=ParseMode.HTML)
-                    await asyncio.sleep(5)  # 回复延迟5S避免触发洪水防御
+                    await asyncio.sleep(10 + self.random.random() * 50)  # 回复延迟 [10, 60) 避免触发洪水防御
             except BadRequest as exc:
                 logger.error(f"执行自动签到时发生错误 用户UID[{user_id}]")
                 logger.exception(exc)