diff --git a/zimbra/certificat/renew_cert_acmesh_zimbra.sh b/zimbra/certificat/renew_cert_acmesh_zimbra.sh
index 2c396aa..22c5118 100644
--- a/zimbra/certificat/renew_cert_acmesh_zimbra.sh
+++ b/zimbra/certificat/renew_cert_acmesh_zimbra.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 su zimbra /opt/zimbra/bin/zmproxyctl stop
 /root/.acme.sh/acme.sh --issue --standalone -d replace_host
 cd  /etc/myacme/replace_host/