diff --git a/hosts/mastodon/default.nix b/hosts/mastodon/default.nix
index 82ed81d7..cbf7afe5 100644
--- a/hosts/mastodon/default.nix
+++ b/hosts/mastodon/default.nix
@@ -34,6 +34,10 @@
         "${config.networking.hostName}.serv.zentralwerk.org"
       ];
       DEFAULT_LOCALE = "de";
+      TRUSTED_PROXY_IP = with zentralwerk.lib.config.site.net.serv;
+        hosts4.public-access-proxy;
+      WEB_CONCURRENCY = toString config.deployment.vcpu;
+      # MAX_THREADS = toString 5;
 
       LDAP_ENABLED = "true";
       LDAP_METHOD = "simple_tls";