diff --git a/lib/PayPal/Api/Item.php b/lib/PayPal/Api/Item.php
index 8c2d7d5..2bc0cf7 100644
--- a/lib/PayPal/Api/Item.php
+++ b/lib/PayPal/Api/Item.php
@@ -200,7 +200,7 @@ class Item extends PPModel
      * 
      *
      * @param string $url
-     * @throws InvalidArgumentException
+     * @throws \InvalidArgumentException
      * @return $this
      */
     public function setUrl($url)
diff --git a/lib/PayPal/Core/PPHttpConfig.php b/lib/PayPal/Core/PPHttpConfig.php
index a54e223..f9c35da 100644
--- a/lib/PayPal/Core/PPHttpConfig.php
+++ b/lib/PayPal/Core/PPHttpConfig.php
@@ -19,7 +19,7 @@ class PPHttpConfig
      * @var array
      */
     public static $defaultCurlOptions = array(
-        CURLOPT_SSLVERSION => 3,
+        CURLOPT_SSLVERSION => 1,
         CURLOPT_CONNECTTIMEOUT => 10,
         CURLOPT_RETURNTRANSFER => TRUE,
         CURLOPT_TIMEOUT => 60,    // maximum number of seconds to allow cURL functions to execute
diff --git a/release_notes.md b/release_notes.md
index b4640bd..f2510d7 100644
--- a/release_notes.md
+++ b/release_notes.md
@@ -3,7 +3,9 @@ PayPal PHP SDK release notes
 
 v0.13.1
 ----
+* Enabled TLS version 1.x for SSL Negotiation
 * Updated Identity Support from SDK Core
+* Fixed Backward Compatibility changes
 
 v0.13.0
 ----