diff --git a/modules/papers.py b/modules/papers.py
index b01f6e7..1a2aeb4 100644
--- a/modules/papers.py
+++ b/modules/papers.py
@@ -159,9 +159,10 @@ def download_url(url):
         # extract some metadata with xpaths
         citation_pdf_url = find_citation_pdf_url(tree, url)
         citation_title = find_citation_title(tree)
+        citation_title = citation_title.encode("ascii", "ignore")
 
         if citation_pdf_url and citation_title:
-            response = requests.get(citation_pdf_url, headers={"User-Agent": "gundam-gdf"})
+            response = requests.get(citation_pdf_url, headers={"User-Agent": "pdf-defense-force"})
             content = response.content
             if "pdf" in response.headers["content-type"]:
                 extension = ".pdf"