diff --git a/agent/canvas.py b/agent/canvas.py
index 2acf916ab..c156c133c 100644
--- a/agent/canvas.py
+++ b/agent/canvas.py
@@ -283,7 +283,7 @@ class Canvas(Graph):
                 else:
                     self.globals[k] = None
 
-    def run(self, **kwargs):
+    async def run(self, **kwargs):
         st = time.perf_counter()
         self.message_id = get_uuid()
         created_at = int(time.time())
diff --git a/agent/component/llm.py b/agent/component/llm.py
index b08e0591e..807bbc288 100644
--- a/agent/component/llm.py
+++ b/agent/component/llm.py
@@ -249,7 +249,7 @@ class LLM(ComponentBase):
 
         downstreams = self._canvas.get_component(self._id)["downstream"] if self._canvas.get_component(self._id) else []
         ex = self.exception_handler()
-        if any([self._canvas.get_component_obj(cid).component_name.lower()=="message" for cid in downstreams]) and not output_structure and not (ex and ex["goto"]):
+        if any([self._canvas.get_component_obj(cid).component_name.lower()=="message" for cid in downstreams]) and not (ex and ex["goto"]):
             self.set_output("content", partial(self._stream_output, prompt, msg))
             return
 
diff --git a/agent/component/message.py b/agent/component/message.py
index 555534610..ac1d2beae 100644
--- a/agent/component/message.py
+++ b/agent/component/message.py
@@ -17,7 +17,6 @@ import json
 import os
 import random
 import re
-import pypandoc
 import logging
 import tempfile
 from functools import partial
@@ -30,6 +29,7 @@ from common.connection_utils import timeout
 from common.misc_utils import get_uuid
 from common import settings
 
+
 class MessageParam(ComponentParamBase):
     """
     Define the Message component parameters.
@@ -176,6 +176,10 @@ class Message(ComponentBase):
         return ""
 
     def _convert_content(self, content):
+        if not self._param.output_format:
+            return
+
+        import pypandoc
         doc_id = get_uuid()
         
         if self._param.output_format.lower() not in {"markdown", "html", "pdf", "docx"}:
diff --git a/api/apps/canvas_app.py b/api/apps/canvas_app.py
index 2e90c29c0..86ffaedb1 100644
--- a/api/apps/canvas_app.py
+++ b/api/apps/canvas_app.py
@@ -159,10 +159,10 @@ async def run():
     except Exception as e:
         return server_error_response(e)
 
-    def sse():
+    async def sse():
         nonlocal canvas, user_id
         try:
-            for ans in canvas.run(query=query, files=files, user_id=user_id, inputs=inputs):
+            async for ans in canvas.run(query=query, files=files, user_id=user_id, inputs=inputs):
                 yield "data:" + json.dumps(ans, ensure_ascii=False) + "\n\n"
 
             cvs.dsl = json.loads(str(canvas))