Updated to reflect changes in PHP-HTTP

README.md

@@ -25,12 +25,13 @@ curl -sS https://getcomposer.org/installer | php
 php composer.phar require mailgun/mailgun-php:~1.7.2
 ```
 
-You do also need to choose what library to use when you are sending messages. Consult the
+You do also need to choose what library to use when you are sending http messages. Consult the
 [php-http/adapter-implementation](https://packagist.org/providers/php-http/adapter-implementation) virtual package to
-find adapters to use. Example:
+find adapters to use. For more information about virtual packages please refer to 
+[Httplug](http://docs.httplug.io/en/latest/virtual-package/). Example:
 
 ```bash
-php composer.phar require php-http/guzzle6-adapter:^0.1.0
+php composer.phar require php-http/guzzle6-adapter:dev-master
 ```
 
 **For shared hosts without SSH access, check out our [Shared Host Instructions](SharedHostInstall.md).**

composer.json

@@ -5,13 +5,12 @@
         "php": ">=5.4.0",
         "guzzlehttp/psr7": "~1.2",
         "php-http/client-implementation": "@dev",
-        "php-http/discovery": "dev-master"
+        "php-http/discovery": "~0.2"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.6",
         "php-http/guzzle6-adapter": "dev-master",
-        "php-http/httplug": "dev-master",
-        "php-http/message-factory": "dev-master"
+        "php-http/httplug": "dev-master"
     },
     "autoload": {
         "psr-0": {

src/Mailgun/Mailgun.php

@@ -2,7 +2,6 @@
 
 namespace Mailgun;
 
-use Http\Adapter\HttpAdapter;
 use Http\Client\HttpClient;
 use Mailgun\Constants\ExceptionMessages;
 use Mailgun\Messages\Exceptions;
@@ -34,7 +33,7 @@ class Mailgun{
      * @param string $apiEndpoint
      * @param string $apiVersion
      * @param bool $ssl
-     * @param HttpAdapter $httpClient
+     * @param HttpClient $httpClient
      */
     public function __construct(
         $apiKey = null,