diff --git a/src/MessageBird/Objects/Hlr.php b/src/MessageBird/Objects/Hlr.php
index a46c96ef..9338d030 100644
--- a/src/MessageBird/Objects/Hlr.php
+++ b/src/MessageBird/Objects/Hlr.php
@@ -43,6 +43,14 @@ class Hlr extends Base
      */
     public $network;
 
+    /**
+     * A array with extra HLR information. Do note that the attributes in the array can change over time and
+     * can be null (not all information is availble for all countries and providers).
+     *
+     * @var array
+     */
+    public $details = array();
+
     /**
      * A client reference. Here you can put your own reference,
      * like your internal reference.
diff --git a/tests/integration/hlr/HlrTest.php b/tests/integration/hlr/HlrTest.php
index 26df96a8..d66744f7 100644
--- a/tests/integration/hlr/HlrTest.php
+++ b/tests/integration/hlr/HlrTest.php
@@ -16,7 +16,7 @@ public function testCreateHlr()
         $Hlr->msisdn     = 'MessageBird';
         $Hlr->reference  = "yoloswag3000";
 
-        $this->mockClient->expects($this->once())->method('performHttpRequest')->with("POST", 'hlr', null, '{"msisdn":"MessageBird","network":null,"reference":"yoloswag3000","status":null}');
+        $this->mockClient->expects($this->once())->method('performHttpRequest')->with("POST", 'hlr', null, '{"msisdn":"MessageBird","network":null,"details":[],"reference":"yoloswag3000","status":null}');
         $this->client->hlr->create($Hlr);
     }