diff --git a/examples/github.rs b/examples/github.rs
index 95b6fe4..0580696 100644
--- a/examples/github.rs
+++ b/examples/github.rs
@@ -1,4 +1,3 @@
-extern crate hyper;
 extern crate inth_oauth2;
 
 use std::io;
@@ -6,6 +5,7 @@ use inth_oauth2::Client;
 
 fn main() {
     let client = Client::github(
+        Default::default(),
         "01774654cd9a6051e478",
         "9f14d16d95d605e715ec1a9aecec220d2565fd5c",
         Some("https://cmcenroe.me/oauth2-paste")
@@ -18,7 +18,7 @@ fn main() {
     let mut code = String::new();
     io::stdin().read_line(&mut code).unwrap();
 
-    let token = client.request_token(hyper::Client::new(), code.trim()).unwrap();
+    let token = client.request_token(code.trim()).unwrap();
 
     println!("{:?}", token);
 }
diff --git a/examples/google.rs b/examples/google.rs
index f5a9873..176964d 100644
--- a/examples/google.rs
+++ b/examples/google.rs
@@ -1,4 +1,3 @@
-extern crate hyper;
 extern crate inth_oauth2;
 
 use std::io;
@@ -6,6 +5,7 @@ use inth_oauth2::Client;
 
 fn main() {
     let client = Client::google(
+        Default::default(),
         "143225766783-ip2d9qv6sdr37276t77luk6f7bhd6bj5.apps.googleusercontent.com",
         "3kZ5WomzHFlN2f_XbhkyPd3o",
         Some("urn:ietf:wg:oauth:2.0:oob")
@@ -21,7 +21,7 @@ fn main() {
     let mut code = String::new();
     io::stdin().read_line(&mut code).unwrap();
 
-    let token = client.request_token(hyper::Client::new(), code.trim()).unwrap();
+    let token = client.request_token(code.trim()).unwrap();
 
     println!("{:?}", token);
 }
diff --git a/src/client.rs b/src/client.rs
index 94ee043..9eef547 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -9,6 +9,8 @@ use super::{Error, Result, Token};
 
 /// OAuth 2.0 client.
 pub struct Client {
+    http_client: hyper::Client,
+
     auth_uri: String,
     token_uri: String,
 
@@ -27,11 +29,13 @@ macro_rules! site_constructors {
         $(
             #[$attr]
             pub fn $ident<S: Into<String>>(
+                http_client: hyper::Client,
                 client_id: S,
                 client_secret: S,
                 redirect_uri: Option<S>
             ) -> Self {
                 Client {
+                    http_client: http_client,
                     auth_uri: String::from($auth_uri),
                     token_uri: String::from($token_uri),
                     client_id: client_id.into(),
@@ -46,6 +50,7 @@ macro_rules! site_constructors {
 impl Client {
     /// Creates an OAuth 2.0 client.
     pub fn new<S: Into<String>>(
+        http_client: hyper::Client,
         auth_uri: S,
         token_uri: S,
         client_id: S,
@@ -53,9 +58,9 @@ impl Client {
         redirect_uri: Option<S>
     ) -> Self {
         Client {
+            http_client: http_client,
             auth_uri: auth_uri.into(),
             token_uri: token_uri.into(),
-
             client_id: client_id.into(),
             client_secret: client_secret.into(),
             redirect_uri: redirect_uri.map(Into::into),
@@ -100,7 +105,7 @@ impl Client {
     }
 
     /// Requests an access token using an authorization code.
-    pub fn request_token(&self, client: hyper::Client, code: &str) -> Result<Token> {
+    pub fn request_token(&self, code: &str) -> Result<Token> {
         let auth_header = header::Authorization(
             header::Basic {
                 username: self.client_id.clone(),
@@ -128,7 +133,7 @@ impl Client {
 
         let body_str = form_urlencoded::serialize(body_pairs);
 
-        let request = client.post(&self.token_uri)
+        let request = self.http_client.post(&self.token_uri)
             .header(auth_header)
             .header(accept_header)
             .header(header::ContentType::form_url_encoded())