diff --git a/src/tickets/models.py b/src/tickets/models.py
index 421d16d1..be4f69fa 100644
--- a/src/tickets/models.py
+++ b/src/tickets/models.py
@@ -53,7 +53,7 @@ class BaseTicket(CreatedUpdatedModel, UUIDModel):
         return qrcode_base64
 
     def get_qr_code_url(self):
-        return 'data:image/png;base64,{}'.format(self.get_qr_code_base64)
+        return 'data:image/png;base64,{}'.format(self.get_qr_code_base64().decode('utf-8'))
 
     def generate_pdf(self):
         return generate_pdf_letter(