diff --git a/examples/echo_bot.rs b/examples/echo_bot.rs
index 13822260..67cbfbb3 100644
--- a/examples/echo_bot.rs
+++ b/examples/echo_bot.rs
@@ -1,11 +1,3 @@
-extern crate futures;
-extern crate tokio;
-extern crate tokio_xmpp;
-extern crate jid;
-extern crate minidom;
-extern crate xmpp_parsers;
-extern crate try_from;
-
 use std::env::args;
 use std::process::exit;
 use try_from::TryFrom;
diff --git a/examples/echo_component.rs b/examples/echo_component.rs
index 1239354a..b9e24265 100644
--- a/examples/echo_component.rs
+++ b/examples/echo_component.rs
@@ -1,11 +1,3 @@
-extern crate futures;
-extern crate tokio;
-extern crate tokio_xmpp;
-extern crate jid;
-extern crate minidom;
-extern crate xmpp_parsers;
-extern crate try_from;
-
 use std::env::args;
 use std::process::exit;
 use std::str::FromStr;
diff --git a/src/happy_eyeballs.rs b/src/happy_eyeballs.rs
index 7bdab7ee..451f9c73 100644
--- a/src/happy_eyeballs.rs
+++ b/src/happy_eyeballs.rs
@@ -115,7 +115,7 @@ impl Future for Connecter {
                         Ok(Async::NotReady)
                     }
                     Ok(Async::Ready(srv_result)) => {
-                        let mut srv_map: BTreeMap<_, _> =
+                        let srv_map: BTreeMap<_, _> =
                             srv_result.iter()
                             .map(|srv| (srv.priority(), (srv.target().clone(), srv.port())))
                             .collect();
diff --git a/src/lib.rs b/src/lib.rs
index f874315f..b1942119 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,23 +2,6 @@
 
 //! XMPP implemeentation with asynchronous I/O using Tokio.
 
-extern crate futures;
-extern crate tokio;
-extern crate tokio_io;
-extern crate tokio_codec;
-extern crate bytes;
-extern crate xml5ever;
-extern crate quick_xml;
-extern crate minidom;
-extern crate native_tls;
-extern crate tokio_tls;
-extern crate sasl;
-extern crate jid;
-extern crate trust_dns_resolver;
-extern crate trust_dns_proto;
-extern crate idna;
-extern crate xmpp_parsers;
-extern crate try_from;
 #[macro_use]
 extern crate derive_error;