diff --git a/src/system/modules/nginx/default.nix b/src/system/modules/nginx/default.nix
index 4e10513..7f508f0 100644
--- a/src/system/modules/nginx/default.nix
+++ b/src/system/modules/nginx/default.nix
@@ -46,6 +46,7 @@ in
       recommendedOptimisation = true;
       recommendedGzipSettings = true;
       eventsConfig = "worker_connections 4096;";
+      defaultSSLListenPort = 4443;
 
       # Catch-all default - friendly error for unknown subdomains
       virtualHosts."_" = {