diff --git a/comptabilite/views.py b/comptabilite/views.py
index 7e6188d..e0fa399 100644
--- a/comptabilite/views.py
+++ b/comptabilite/views.py
@@ -206,10 +206,10 @@ def generate_pdf_for_spf(request, accounting_year):
     """
     response = HttpResponse(content_type="application/pdf")
     response["Content-Disposition"] = (
-        'attachment; filename="comptes_simplifies_annuels_' + accounting_year + '.pdf"'
+        'attachment; filename="comptes_simplifies_annuels_' + str(accounting_year) + '.pdf"'
     )
     document = SpfDocument(response)
-    document.generate(accounting_year)
+    document.generate(str(accounting_year))
     document.download()
 
     return response