diff --git a/api/app/core/rag/deepdoc/parser/mineru_parser.py b/api/app/core/rag/deepdoc/parser/mineru_parser.py
index ec380922..fe6178ec 100644
--- a/api/app/core/rag/deepdoc/parser/mineru_parser.py
+++ b/api/app/core/rag/deepdoc/parser/mineru_parser.py
@@ -13,7 +13,7 @@ from io import BytesIO
 from os import PathLike
 from pathlib import Path
 from queue import Empty, Queue
-from typing import Any, Callable, Optional
+from typing import Any, Callable, Optional, Union
 
 import numpy as np
 import pdfplumber
@@ -439,7 +439,7 @@ class MinerUParser(RAGPdfParser):
     def parse_pdf(
         self,
         filepath: str | PathLike[str],
-        binary: BytesIO | bytes,
+        binary: Optional[Union[BytesIO, bytes]] = None,
         callback: Optional[Callable] = None,
         *,
         output_dir: Optional[str] = None,