diff --git a/src/helpers/vyos-certbot-renew-pki.sh b/src/helpers/vyos-certbot-renew-pki.sh
index d0b663f7b..1c273d2fa 100755
--- a/src/helpers/vyos-certbot-renew-pki.sh
+++ b/src/helpers/vyos-certbot-renew-pki.sh
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/vbash
 source /opt/vyatta/etc/functions/script-template
 /usr/libexec/vyos/conf_mode/pki.py certbot_renew