diff --git a/src/libdoh/Cargo.toml b/src/libdoh/Cargo.toml
index 62e69d1..d81f9cf 100644
--- a/src/libdoh/Cargo.toml
+++ b/src/libdoh/Cargo.toml
@@ -19,9 +19,9 @@ anyhow = "1.0.36"
 byteorder = "1.3.4"
 base64 = "0.13.0"
 futures = "0.3.8"
-hyper = { version = "0.14.1", default-features = false, features = ["server", "http1", "http2", "stream"] }
+hyper = { version = "0.14.2", default-features = false, features = ["server", "http1", "http2", "stream"] }
 tokio = { version = "1.0.0", features = ["full"] }
-tokio-rustls = { version = "0.21.1", optional = true }
+tokio-rustls = { version = "0.22.0", optional = true }
 
 [profile.release]
 codegen-units = 1
diff --git a/src/libdoh/src/tls.rs b/src/libdoh/src/tls.rs
index 85beebf..c239636 100644
--- a/src/libdoh/src/tls.rs
+++ b/src/libdoh/src/tls.rs
@@ -11,7 +11,6 @@ use tokio_rustls::{
     rustls::{internal::pemfile, NoClientAuth, ServerConfig},
     TlsAcceptor,
 };
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
 
 pub fn create_tls_acceptor<P, P2>(certs_path: P, certs_keys_path: P2) -> io::Result<TlsAcceptor>
 where
@@ -82,7 +81,7 @@ impl DoH {
     pub async fn start_with_tls(
         self,
         tls_acceptor: TlsAcceptor,
-        mut listener: TcpListener,
+        listener: TcpListener,
         server: Http<LocalExecutor>,
     ) -> Result<(), DoHError> {
         let listener_service = async {
diff --git a/src/main.rs b/src/main.rs
index efbf144..39fc8ef 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,11 +18,10 @@ use std::sync::Arc;
 use std::time::Duration;
 
 fn main() {
-    let mut runtime_builder = tokio::runtime::Builder::new();
+    let mut runtime_builder = tokio::runtime::Builder::new_multi_thread();
     runtime_builder.enable_all();
-    runtime_builder.threaded_scheduler();
     runtime_builder.thread_name("doh-proxy");
-    let mut runtime = runtime_builder.build().unwrap();
+    let runtime = runtime_builder.build().unwrap();
 
     let mut globals = Globals {
         #[cfg(feature = "tls")]