diff --git a/web/frontend-server/src/main.rs b/web/frontend-server/src/main.rs
index 7f4a081..90bf72c 100644
--- a/web/frontend-server/src/main.rs
+++ b/web/frontend-server/src/main.rs
@@ -60,13 +60,15 @@ async fn main() {
 
     if use_tls {
         eprintln!("Generating self-signed TLS certificate...");
-        let cert = rcgen::generate_simple_self_signed(vec!["localhost", "normogen"])
-            .expect("failed to generate cert");
-        let cert_der = rcgen::Certificate::der(&cert);
-        let key_der = rcgen::Certificate::serialize_der_key(&cert);
+        let cert = rcgen::generate_simple_self_signed(
+            ["localhost".to_string(), "normogen".to_string()],
+        )
+        .expect("failed to generate cert");
+        let cert_der = cert.cert.der().clone();
+        let key_der = cert.key_pair.serialize_der();
         let rustls_cert = axum_server::tls_rustls::RustlsConfig::from_der(
             cert_der.to_vec(),
-            key_der.to_vec(),
+            key_der,
         )
         .await
         .expect("failed to build rustls config");