diff --git a/roles/mailman3/defaults/main.yml b/roles/mailman3/defaults/main.yml
index 229026ff03..5782b8ba5c 100644
--- a/roles/mailman3/defaults/main.yml
+++ b/roles/mailman3/defaults/main.yml
@@ -29,7 +29,7 @@ mailman_hyperkitty_admin_db_pass: changeme
 mailman_hyperkitty_db_pass: changeme
 mailman_hyperkitty_cookie_key: changeme
 mailman_hyperkitty_archiver_key: changeme
-mailman_gunicorn_workers: 4
+mailman_gunicorn_workers: 15
 mailman_domains:
 - lists.example.com
 - lists.example.org