diff --git a/Cargo.toml b/Cargo.toml
index c73533e..5defb89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ clap = { version = "4.3.11", features = ["std", "cargo", "wrap_help"] }
 rand = "0.8.5"
 toml = { version = "0.7.6", default-features = false, features = ["parse"] }
 rustc-hash = "1.1.0"
-serde = { version = "1.0.167", default-features = false, features = ["derive"] }
+serde = { version = "1.0.171", default-features = false, features = ["derive"] }
 bytes = "1.4.0"
 thiserror = "1.0.43"
 x509-parser = "0.15.0"
@@ -31,7 +31,6 @@ futures = { version = "0.3.28", features = ["alloc", "async-await"] }
 tokio = { version = "1.29.1", default-features = false, features = [
   "net",
   "rt-multi-thread",
-  "parking_lot",
   "time",
   "sync",
   "macros",
diff --git a/quinn b/quinn
index b30711f..e652b6d 160000
--- a/quinn
+++ b/quinn
@@ -1 +1 @@
-Subproject commit b30711f5595983989b60bbbad0ac3f067be7a596
+Subproject commit e652b6d999f053ffe21eeea247854882ae480281
diff --git a/src/globals.rs b/src/globals.rs
index cd47611..64f9d8d 100644
--- a/src/globals.rs
+++ b/src/globals.rs
@@ -12,7 +12,7 @@ pub struct Globals {
   /// Configuration parameters for proxy transport and request handlers
   pub proxy_config: ProxyConfig, // TODO: proxy configはarcに包んでこいつだけ使いまわせばいいように変えていく。backendsも？
 
-  /// Shared context - Backend application objects to which http request handler forward incoming requests
+  /// Backend application objects to which http request handler forward incoming requests
   pub backends: Backends,
 
   /// Shared context - Counter for serving requests
diff --git a/src/proxy/proxy_tls.rs b/src/proxy/proxy_tls.rs
index aa9c69f..317be7c 100644
--- a/src/proxy/proxy_tls.rs
+++ b/src/proxy/proxy_tls.rs
@@ -146,29 +146,24 @@ where
             continue;
           }
           let mut conn: quinn::Connecting = new_conn.unwrap();
-          let hsd = match conn.handshake_data().await {
-            Ok(h) => h,
-            Err(_) => continue
+          let Ok(hsd) = conn.handshake_data().await else {
+            continue
           };
 
-          let hsd_downcast = match hsd.downcast::<HandshakeData>() {
-            Ok(d) => d,
-            Err(_) => continue
+          let Ok(hsd_downcast) = hsd.downcast::<HandshakeData>() else {
+            continue
           };
-          let new_server_name = match hsd_downcast.server_name {
-            Some(sn) => sn.to_server_name_vec(),
-            None => {
-              warn!("HTTP/3 no SNI is given");
-              continue;
-            }
+          let Some(new_server_name) = hsd_downcast.server_name else {
+            warn!("HTTP/3 no SNI is given");
+            continue;
           };
           debug!(
             "HTTP/3 connection incoming (SNI {:?})",
-            new_server_name.0
+            new_server_name
           );
           // TODO: server_nameをここで出してどんどん深く投げていくのは効率が悪い。connecting -> connectionsの後でいいのでは？
           // TODO: 通常のTLSと同じenumか何かにまとめたい
-          let fut = self.clone().connection_serve_h3(conn, new_server_name);
+          let fut = self.clone().connection_serve_h3(conn, new_server_name.to_server_name_vec());
           self.globals.runtime_handle.spawn(async move {
             // Timeout is based on underlying quic
             if let Err(e) = fut.await {