diff --git a/modules/adguard.nix b/modules/adguard.nix
index d9b73a7..94caadc 100644
--- a/modules/adguard.nix
+++ b/modules/adguard.nix
@@ -70,6 +70,7 @@ in
           server_name = cfg.domain;
           certificate_path = "/var/lib/acme/${cfg.domain}/fullchain.pem";
           private_key_path = "/var/lib/acme/${cfg.domain}/key.pem";
+          port_https = 3001; # Prevent conflict with Nginx on port 443
           port_dns_over_tls = 853;
           port_dns_over_quic = 0;
           allow_unencrypted_doh = false;