diff --git a/web/frontend-server/src/main.rs b/web/frontend-server/src/main.rs
index 90bf72c..1f81974 100644
--- a/web/frontend-server/src/main.rs
+++ b/web/frontend-server/src/main.rs
@@ -67,7 +67,7 @@ async fn main() {
         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(),
+            vec![cert_der.to_vec()],
             key_der,
         )
         .await