diff --git a/.env.sample b/.env.sample
index e0b2270..2952c89 100644
--- a/.env.sample
+++ b/.env.sample
@@ -41,3 +41,6 @@ MAIL_SMTP_PORT=
 MAIL_SMTP_LOGIN=
 MAIL_SMTP_PWD=
 MAIL_REJECT_SELFSIGNED_TLS=
+
+# Force app to start on IPv6
+#HOSTNAME=::
\ No newline at end of file