fix

app.py

@@ -5,10 +5,10 @@ from typing import List
 from PIL import Image
 from loadimg import load_img
 import io
-import markitdown
+from markitdown import MarkItDown
 
 converter = Converter()
-
+md = MarkItDown()
 
 def convert_file_to_pdf(filename: str) -> str:
     """
@@ -62,7 +62,7 @@ def convert_file_to_markdown(filename: str) -> str:
     Returns:
         str: The markdown representation of the file.
     """
-    return markitdown.convert(filename.name).text_content
+    return md.convert(filename.name).text_content
 
 
 # Create individual interfaces