diff --git a/etc/nginx/sites-available/mastodon.conf b/etc/nginx/sites-available/mastodon.conf
index 9d36b01..243d3b5 100644
--- a/etc/nginx/sites-available/mastodon.conf
+++ b/etc/nginx/sites-available/mastodon.conf
@@ -27,8 +27,8 @@ server {
 }
 
 server {
-  listen [::]:443 ssl; # managed by Certbot
-  listen 443 ssl; # managed by Certbot
+  listen [::]:443 http2 ssl ipv6only=on;
+  listen 443 http2 ssl;
 
   server_name fediverse.jarv.is;