diff --git a/src/AppNexusClient.php b/src/AppNexusClient.php
index 13ab099..a82bec0 100644
--- a/src/AppNexusClient.php
+++ b/src/AppNexusClient.php
@@ -3,7 +3,7 @@
 
 class AppNexusClient
 {
-    private $http;
+    protected $http;
     private $host;
     private $username;
     private $password;