diff --git a/apps/resm/tasks.py b/apps/resm/tasks.py
index 40d3dbd..e31f6e8 100644
--- a/apps/resm/tasks.py
+++ b/apps/resm/tasks.py
@@ -300,7 +300,7 @@ def get_pdf_from_oa_url(number_of_task=100):
 
 
 @shared_task(base=CustomTask)
-def download_pdf(self, paper_id):
+def download_pdf(paper_id):
     """
     下载单个论文的PDF
     """