diff --git a/api_server.py b/api_server.py
index 2c93cf8..87f5bc8 100644
--- a/api_server.py
+++ b/api_server.py
@@ -650,7 +650,11 @@ async def get_raw_post_json(channel: str, post_id: int, token: str | None = None
         if not message:
             raise HTTPException(status_code=404, detail="Post not found")
             
-        return JSONResponse(content=message, media_type="application/json")
+        # Return message as JSON using json.dumps with default=str to handle non-serializable objects
+        return Response(
+            content=json.dumps(message, indent=2, ensure_ascii=False, default=str),
+            media_type="application/json"
+        )
     except Exception as e:
         error_message = f"Failed to get raw JSON post for channel {channel}, post_id {post_id}: {str(e)}"
         logger.error(error_message)