diff --git a/conf/nginx-site-ssl.conf b/conf/nginx-site-ssl.conf
index de8f50b..a023284 100644
--- a/conf/nginx-site-ssl.conf
+++ b/conf/nginx-site-ssl.conf
@@ -1,5 +1,6 @@
 server {
 	listen 443 ssl;
+	listen   [::]:443 ssl ipv6only=on; ## listen for ipv6
 
 	root /var/www/html;
 	index index.php index.html index.htm;