diff --git a/update.py b/update.py
index 18265d2..e03adc3 100755
--- a/update.py
+++ b/update.py
@@ -57,7 +57,7 @@ def send_mail(subject: str, body: str) -> None:
     msg["Message-ID"] = make_msgid()
 
     # Add extra mail headers
-    for header, value in config.getattr("MAIL_HEADERS", []):
+    for header, value in config.MAIL_HEADERS:
         msg[header] = value
 
     msg.set_content(body)