diff --git a/metagpt/actions/talk_action.py b/metagpt/actions/talk_action.py
index 555b202d1..e81f14bdd 100644
--- a/metagpt/actions/talk_action.py
+++ b/metagpt/actions/talk_action.py
@@ -14,7 +14,7 @@ from metagpt.logs import logger
 
 
 class TalkAction(Action):
-    def __init__(self, name: str = '', talk='', history_summary='', knowledge='', context=None, llm=None, **kwargs):
+    def __init__(self, name: str = "", talk="", history_summary="", knowledge="", context=None, llm=None, **kwargs):
         context = context or {}
         context["talk"] = talk
         context["history_summery"] = history_summary
@@ -32,7 +32,7 @@ class TalkAction(Action):
         if self._history_summary != "":
             prompt += "According to the historical conversation above, "
         language = CONFIG.language or DEFAULT_LANGUAGE
-        prompt += f"Answer in {language}:\n {self._talk}"
+        prompt += f"Answer in {language}, and the answers must follow the Markdown format.\n {self._talk}"
         return prompt
 
     async def run(self, *args, **kwargs) -> ActionOutput: