Update main.py

main.py

@@ -429,7 +429,7 @@ async def presentation_chat(query: PresentationChatModel, background_tasks: Back
 
     if marp_content:
         # Replace image keywords
-        marp_content_with_images = replace_image_keywords(marp_content)
+        marp_content_with_images = replace_image_keywords(marp_content.strip("```").strip("``"))
     
         # Convert Markdown to HTML
         html_content = convert_markdown_marp(marp_content_with_images, 'html')