diff --git a/services/matrix.nix b/services/matrix.nix
index 5f5407f..fe6733a 100644
--- a/services/matrix.nix
+++ b/services/matrix.nix
@@ -12,7 +12,7 @@
   services.caddy.virtualHosts.${service_configs.https.domain}.extraConfig = lib.mkBefore ''
     header /.well-known/matrix/* Content-Type application/json
     header /.well-known/matrix/* Access-Control-Allow-Origin *
-    respond /.well-known/matrix/server `{"m.server": "${service_configs.https.matrix_hostname}:443"}`
+    respond /.well-known/matrix/server `{"m.server": "${service_configs.https.matrix_hostname}:${service_configs.ports.https}"}`
     respond /.well-known/matrix/client `{"m.server":{"base_url":"https://${service_configs.https.matrix_hostname}"},"m.homeserver":{"base_url":"https://${service_configs.https.matrix_hostname}"},"org.matrix.msc3575.proxy":{"base_url":"https://${config.services.matrix-conduit.settings.global.server_name}"}}`
   '';