diff --git a/deploy/files/sites-available/impress.conf b/deploy/files/sites-available/impress.conf
index cbb3ae4f..c889818a 100644
--- a/deploy/files/sites-available/impress.conf
+++ b/deploy/files/sites-available/impress.conf
@@ -1,6 +1,7 @@
 server {
   server_name {{ impress_hostname }};
   listen 80;
+  listen [::]:80;
   if ($host = {{ impress_hostname }}) {
     return 301 https://$host$request_uri;
   }
@@ -9,6 +10,7 @@ server {
 server {
   server_name {{ impress_hostname }};
   listen 443 ssl;
+  listen [::]:443 ssl;
   ssl_certificate /etc/letsencrypt/live/{{ impress_hostname }}/fullchain.pem;
   ssl_certificate_key /etc/letsencrypt/live/{{ impress_hostname }}/privkey.pem;
   include /etc/letsencrypt/options-ssl-nginx.conf;