diff --git a/src/client/auth.rs b/src/client/auth.rs
index d961f7a0..81210dc7 100644
--- a/src/client/auth.rs
+++ b/src/client/auth.rs
@@ -16,12 +16,12 @@ use crate::{AuthError, Error, ProtocolError};
 const NS_XMPP_SASL: &str = "urn:ietf:params:xml:ns:xmpp-sasl";
 
 pub struct ClientAuth<S: AsyncRead + AsyncWrite> {
-    future: Box<Future<Item = XMPPStream<S>, Error = Error>>,
+    future: Box<dyn Future<Item = XMPPStream<S>, Error = Error>>,
 }
 
 impl<S: AsyncRead + AsyncWrite + 'static> ClientAuth<S> {
     pub fn new(stream: XMPPStream<S>, creds: Credentials) -> Result<Self, Error> {
-        let local_mechs: Vec<Box<Fn() -> Box<Mechanism>>> = vec![
+        let local_mechs: Vec<Box<dyn Fn() -> Box<dyn Mechanism>>> = vec![
             Box::new(|| Box::new(Scram::<Sha256>::from_credentials(creds.clone()).unwrap())),
             Box::new(|| Box::new(Scram::<Sha1>::from_credentials(creds.clone()).unwrap())),
             Box::new(|| Box::new(Plain::from_credentials(creds.clone()).unwrap())),
@@ -62,7 +62,7 @@ impl<S: AsyncRead + AsyncWrite + 'static> ClientAuth<S> {
         Err(AuthError::NoMechanism)?
     }
 
-    fn handle_challenge(stream: XMPPStream<S>, mut mechanism: Box<Mechanism>) -> Box<Future<Item = XMPPStream<S>, Error = Error>> {
+    fn handle_challenge(stream: XMPPStream<S>, mut mechanism: Box<dyn Mechanism>) -> Box<dyn Future<Item = XMPPStream<S>, Error = Error>> {
         Box::new(
             stream.into_future()
             .map_err(|(e, _stream)| e.into())
diff --git a/src/client/mod.rs b/src/client/mod.rs
index 99965dc8..37085788 100644
--- a/src/client/mod.rs
+++ b/src/client/mod.rs
@@ -33,7 +33,7 @@ const NS_JABBER_CLIENT: &str = "jabber:client";
 enum ClientState {
     Invalid,
     Disconnected,
-    Connecting(Box<Future<Item = XMPPStream, Error = Error>>),
+    Connecting(Box<dyn Future<Item = XMPPStream, Error = Error>>),
     Connected(XMPPStream),
 }
 
diff --git a/src/component/mod.rs b/src/component/mod.rs
index cfc1ee5e..87381117 100644
--- a/src/component/mod.rs
+++ b/src/component/mod.rs
@@ -30,7 +30,7 @@ const NS_JABBER_COMPONENT_ACCEPT: &str = "jabber:component:accept";
 enum ComponentState {
     Invalid,
     Disconnected,
-    Connecting(Box<Future<Item = XMPPStream, Error = Error>>),
+    Connecting(Box<dyn Future<Item = XMPPStream, Error = Error>>),
     Connected(XMPPStream),
 }
 
diff --git a/src/error.rs b/src/error.rs
index 375c5178..d8b2063d 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -59,7 +59,7 @@ impl StdError for ParseError {
     fn description(&self) -> &str {
         self.0.as_ref()
     }
-    fn cause(&self) -> Option<&StdError> {
+    fn cause(&self) -> Option<&dyn StdError> {
         None
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index bfed02a5..07ae8784 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![deny(unsafe_code, unused, missing_docs)]
+#![deny(unsafe_code, unused, missing_docs, bare_trait_objects)]
 
 //! XMPP implementation with asynchronous I/O using Tokio.
 
diff --git a/src/xmpp_codec.rs b/src/xmpp_codec.rs
index 482cd786..3920ba41 100644
--- a/src/xmpp_codec.rs
+++ b/src/xmpp_codec.rs
@@ -219,7 +219,7 @@ impl Decoder for XMPPCodec {
     type Error = ParserError;
 
     fn decode(&mut self, buf: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
-        let buf1: Box<AsRef<[u8]>> = if !self.buf.is_empty() && !buf.is_empty() {
+        let buf1: Box<dyn AsRef<[u8]>> = if !self.buf.is_empty() && !buf.is_empty() {
             let mut prefix = std::mem::replace(&mut self.buf, vec![]);
             prefix.extend_from_slice(buf.take().as_ref());
             Box::new(prefix)