Update app.py

app.py

@@ -455,7 +455,7 @@ with gr.Blocks(theme='gradio/soft',js=js_func) as demo:
             # Upload PDFs
             with gr.Column():
                 gr.Markdown("### Step 1: Upload PDF Files")
-                upload_button = gr.File(label="Upload files", file_types=[".pdf"], multiple = True)
+                upload_button = gr.File(label="Upload files", file_types=[".pdf"], file_count="multiple")
                 pdf1 = gr.Dropdown(choices=get_pdf_files(PDF_FOLDER), label="Select PDF 1")
                 pdf2 = gr.Dropdown(choices=get_pdf_files(PDF_FOLDER), label="Select PDF 2")
                 upload_button.upload(upload_file_and_update_dropdown, upload_button, [pdf1, pdf2])