diff --git a/commentaries/views.py b/commentaries/views.py
index 6a2dbb3754926722cd3b69682aa0c2257863b758..d8554ec92e92690cf12c7c6e27802183d3f2154a 100644
--- a/commentaries/views.py
+++ b/commentaries/views.py
@@ -247,7 +247,7 @@ def vet_commentary_request_ack(request, commentary_id):
             email_args = (
                 'SciPost Commentary Page activated',
                 email_text,
-                [commentary.requested_by.user.email],
+                commentary.requested_by.user.email,
                 ['commentaries@scipost.org']
             )
             emailmessage = EmailMessage(*email_args, reply_to=['commentaries@scipost.org'])