diff --git a/src/telegram/app.py b/src/telegram/app.py
index 784bf98..cb76a6b 100644
--- a/src/telegram/app.py
+++ b/src/telegram/app.py
@@ -48,6 +48,8 @@ def create_app(config: BotConfig) -> Application:
 
 def run() -> None:
     """加载配置并启动 bot"""
+    import asyncio
+
     logger = setup_logger()
     config = BotConfig.from_env()
 
@@ -57,4 +59,11 @@ def run() -> None:
 
     app = create_app(config)
     logger.info("Bot starting...")
-    app.run_polling()
+
+    async def main():
+        async with app:
+            await app.start()
+            await app.updater.start_polling()
+            await asyncio.Event().wait()
+
+    asyncio.run(main())
diff --git a/src/telegram/handlers.py b/src/telegram/handlers.py
index f5a0003..501a8e6 100644
--- a/src/telegram/handlers.py
+++ b/src/telegram/handlers.py
@@ -75,6 +75,9 @@ class Aria2BotAPI:
 
     async def install(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
         logger.info(f"收到 /install 命令 - {_get_user_info(update)}")
+        if is_aria2_installed():
+            await self._reply(update, context, "aria2 已安装，无需重复安装。如需重新安装，请先运行 /uninstall")
+            return
         await self._reply(update, context, "正在安装 aria2，处理中，请稍候...")
         try:
             result = await self.installer.install()
@@ -106,6 +109,9 @@ class Aria2BotAPI:
 
     async def uninstall(self, update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
         logger.info(f"收到 /uninstall 命令 - {_get_user_info(update)}")
+        if not is_aria2_installed():
+            await self._reply(update, context, "aria2 未安装，无需卸载")
+            return
         await self._reply(update, context, "正在卸载 aria2，处理中，请稍候...")
         try:
             try: