diff --git a/lib/PayPal/Cache/AuthorizationCache.php b/lib/PayPal/Cache/AuthorizationCache.php
index 83910d3b..6661c9b9 100644
--- a/lib/PayPal/Cache/AuthorizationCache.php
+++ b/lib/PayPal/Cache/AuthorizationCache.php
@@ -53,7 +53,7 @@ public static function pull($config = null, $clientId = null)
      * @param      $tokenExpiresIn
      * @throws \Exception
      */
-    public static function push($config = null, $clientId, $accessToken, $tokenCreateTime, $tokenExpiresIn)
+    public static function push($config = null, $clientId = '', $accessToken = '', $tokenCreateTime = '', $tokenExpiresIn = '')
     {
         // Return if not enabled
         if (!self::isEnabled($config)) {
diff --git a/lib/PayPal/Core/PayPalHttpConfig.php b/lib/PayPal/Core/PayPalHttpConfig.php
index 8e431b30..5db51cf0 100644
--- a/lib/PayPal/Core/PayPalHttpConfig.php
+++ b/lib/PayPal/Core/PayPalHttpConfig.php
@@ -283,7 +283,7 @@ public function setUserAgent($userAgentString)
      * @param       $prefix
      * @return array
      */
-    public function getHttpConstantsFromConfigs($configs = array(), $prefix)
+    public function getHttpConstantsFromConfigs($configs = array(), $prefix = '')
     {
         $arr = array();
         if ($prefix != null && is_array($configs)) {
diff --git a/lib/PayPal/Transport/PayPalRestCall.php b/lib/PayPal/Transport/PayPalRestCall.php
index a5059591..91fdf126 100644
--- a/lib/PayPal/Transport/PayPalRestCall.php
+++ b/lib/PayPal/Transport/PayPalRestCall.php
@@ -50,7 +50,7 @@ public function __construct(ApiContext $apiContext)
      * @return mixed
      * @throws \PayPal\Exception\PayPalConnectionException
      */
-    public function execute($handlers = array(), $path, $method, $data = '', $headers = array())
+    public function execute($handlers = array(), $path = '/', $method = 'POST', $data = '', $headers = array())
     {
         $config = $this->apiContext->getConfig();
         $httpConfig = new PayPalHttpConfig(null, $method, $config);