diff --git a/classes/adonis.php b/classes/adonis.php
index 03aaab7..28a5a8a 100644
--- a/classes/adonis.php
+++ b/classes/adonis.php
@@ -76,7 +76,7 @@ class Adonis {
         $data = array("credentials" => array(
             "Login" => $this->username,
             "Password" => $this->password,
-            "Lifetime" => $this->lifetime
+            "LifeTime" => $this->lifetime
             ));
 
         $res = $this->request("GNL_API_AUTHENTICATION", $data, $api, false, false, true);