diff --git a/src/Client.php b/src/Client.php
index baddab7..b87920c 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -199,6 +199,11 @@ protected function restCall($apiUrl, $verb, $guzzleParams, $apiversion='',$heade
             $guzzleParams['connect_timeout'] = 1200;
         }
         
+        //Set TLS version to 1.2 because Avartax is discontinuing support TLS 1.0 & 1.1
+        if (version_compare(PHP_VERSION, '5.6.3', '>=')) {
+            $guzzleParams['curl'][CURLOPT_SSLVERSION] = CURL_SSLVERSION_TLSv1_2;
+        }
+        
         // Contact the server
         try {
             $response = $this->client->request($verb, $apiUrl, $guzzleParams);
@@ -241,4 +246,4 @@ protected function restCall($apiUrl, $verb, $guzzleParams, $apiversion='',$heade
             return $e->getResponse()->getBody()->getContents();
         }
     }
-}
+}
\ No newline at end of file