diff --git a/skillagent/skillengine.py b/skillagent/skillengine.py
index aa961f5..feb77ea 100644
--- a/skillagent/skillengine.py
+++ b/skillagent/skillengine.py
@@ -251,7 +251,7 @@ class IndustrialSkillEngine:
 			env = self.request._run_ns
 			user_reply = await env.session_getvalue(sessionkey)
 			while not user_reply:
-				asyncio.sleep(0.5)
+				await asyncio.sleep(0.5)
 				user_reply = await env.session_getvalue(sessionkey)
 			prompt = f"{user_prompt}\n补充输入：{user_reply}"
 			await self._run(prompt, context=context, is_retry=True)