diff --git a/scripts/install b/scripts/install
index 22fb4b2..b4b4cf1 100755
--- a/scripts/install
+++ b/scripts/install
@@ -11,9 +11,9 @@ source /usr/share/yunohost/helpers
 
 admin=$(ynh_user_get_info --username=$admin --key=username)
 admin_mail=$(ynh_user_get_info --username=$admin --key=mail)
-mail_user=$app
-mail_password=$mail_pwd
-mail_domain=$domain
+mail_user="$app"
+mail_password="$mail_pwd"
+mail_domain="$domain"
 
 #=================================================
 # LOGROTATE