diff --git a/easy_my_coop_taxshelter_report/models/tax_shelter_declaration.py b/easy_my_coop_taxshelter_report/models/tax_shelter_declaration.py
index efe5803..c3c04fa 100644
--- a/easy_my_coop_taxshelter_report/models/tax_shelter_declaration.py
+++ b/easy_my_coop_taxshelter_report/models/tax_shelter_declaration.py
@@ -256,7 +256,7 @@ class TaxShelterCertificate(models.Model):
 
     def generate_pdf_report(self, report_type):
         report, name = REPORT_DIC[report_type]
-        report = self.env.ref(report).render_qweb_pdf(self)
+        report = self.env.ref(report).render_qweb_pdf(self.id)[0]
         report = base64.b64encode(report)
         report_name = (
             self.partner_id.name + " " + name + " " + self.declaration_id.name + ".pdf"