diff --git a/sources/Coturn_config_rotate.sh b/sources/Coturn_config_rotate.sh
index 774c996..2780efd 100644
--- a/sources/Coturn_config_rotate.sh
+++ b/sources/Coturn_config_rotate.sh
@@ -9,14 +9,14 @@ external_IP_line="external-ip=__IPV4__,__IPV6__"
 public_ip4="$(curl ip.yunohost.org)" || true
 public_ip6="$(curl ipv6.yunohost.org)" || true
 
-if [[ -n "$public_ip4" ]] && ynh_validate_ip 4 "$public_ip4"
+if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
 then
     external_IP_line="${external_IP_line/'__IPV4__'/$public_ip4}"
 else
     external_IP_line="${external_IP_line/'__IPV4__,'/}"
 fi
 
-if [[ -n "$public_ip6" ]] && ynh_validate_ip 6 "$public_ip6"
+if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
 then
     external_IP_line="${external_IP_line/'__IPV6__'/$public_ip6}"
 else