diff --git a/src/FuseSource/Stomp/Stomp.php b/src/FuseSource/Stomp/Stomp.php
index c4f32fb..4c18176 100755
--- a/src/FuseSource/Stomp/Stomp.php
+++ b/src/FuseSource/Stomp/Stomp.php
@@ -73,6 +73,7 @@ class Stomp
     protected $_username = '';
     protected $_password = '';
     protected $_sessionId;
+    protected $_version;
     protected $_read_timeout_seconds = 60;
     protected $_read_timeout_milliseconds = 0;
     protected $_connect_timeout_seconds = 60;
@@ -188,7 +189,10 @@ protected function _makeConnection ()
      * The Server response back with CONNECTED frame, that has sessionI : A session identifier that uniquely identifies the session.
      * @param string $username
      * @param string $password
-     * @param  string optionalParams
+     * @param  string $optionalParams, possible keys are:
+     *   accept-version => 1.0,1.1,2.0  - From STOMP 1.1 and onwards, the CONNECT frame MUST include the accept-version header. It SHOULD be set to a comma separated list that the client supports.
+     *   host => stomp.github.org - The name of a virtual host that the client wishes to connect to.
+     *   heart-beat => <cx>,<cy>  - Heart-beating can optionally be used to test the healthiness of the underlying TCP connection.
      * @return boolean
      * @throws StompException
      */
@@ -215,6 +219,9 @@ public function connect ($username = '', $password = '', $optionalParams = array
             if (isset($frame->headers['server']) && false !== stristr(trim($frame->headers['server']), 'rabbitmq')) {
                 $this->brokerVendor = 'RMQ';
             }
+            if(isset($frame->headers['version'])){//Server returns stomp version that it will be using.
+            	$this->_version = $frame->headers['version'];
+            }
             return true;
         } else {
             if ($frame instanceof Frame) {
@@ -333,7 +340,9 @@ protected function _waitForReceipt (Frame $frame, $sync)
      * Any messages received on the subscribed destination will henceforth be delivered as MESSAGE frames from the server to the client.
      * The ack header controls the message acknowledgment mode.
      * @param string $destination Destination queue
-     * @param array $properties
+     * @param array $properties, possible values
+     *    ack => auto,client,client-individual - defaults to auto
+     *    id => string - required from 1.1
      * @param boolean $sync Perform request synchronously
      * @return boolean
      * @throws StompException
@@ -375,7 +384,8 @@ public function subscribe ($destination, $properties = null, $sync = null)
      * Remove an existing subscription
      * A standard UNSUBSCRIBE frame does not destroy the durable subscription, it only disconnects the client from the durable subscription.
      * @param string $destination
-     * @param array $properties
+     * @param array $properties , possible values:
+     *   id - required from 1.1
      * @param boolean $sync Perform request synchronously
      * @return boolean
      * @throws StompException
@@ -465,10 +475,13 @@ public function abort ($transactionId = null, $sync = null)
      *
      * @param string|Frame $messageMessage ID
      * @param string $transactionId
+     * @param array $optionalHeaders, possible values
+     *    id - ack ID from message for client or client-individual type of subscriptions.. From stomp v1.2
+     *    subscription -  set to match the value of the subscription's id header. For v1.1
      * @return boolean
      * @throws StompException
      */
-    public function ack ($message, $transactionId = null)
+    public function ack ($message, $transactionId = null, $optionalHeaders = array())
     {
         if ($message instanceof Frame) {
             $headers = $message->headers;
@@ -488,6 +501,10 @@ public function ack ($message, $transactionId = null)
                 $headers['transaction'] = $transactionId;
             }
             $headers['message-id'] = $message;
+           	//Add/update optional header values
+			foreach($optionalHeaders as $name => $value){
+				$headers[$name] = $value;
+           	}
             $frame = new Frame('ACK', $headers);
             $this->_writeFrame($frame);
             return true;
@@ -500,10 +517,13 @@ public function ack ($message, $transactionId = null)
 	 *
 	 * @param $messageMessage string|Frame ID
 	 * @param $transactionId string
+     * @param array $optionalHeaders, possible values
+     *    id - ack ID from message for client or client-individual type of subscriptions.. From stomp v1.2
+     *    subscription -  set to match the value of the subscription's id header. For v1.1
 	 * @return boolean
 	 * @throws StompException
 	 */
-	public function nack($message, $transactionId = null){
+	public function nack($message, $transactionId = null, $optionalHeaders = array()){
 		if($message instanceof Frame){
 			$headers = $message->headers;
 			if(isset($transactionId)){
@@ -517,7 +537,12 @@ public function nack($message, $transactionId = null){
 			if(isset($transactionId)){
 				$headers['transaction'] = $transactionId;
 			}
+
 			$headers['message-id'] = $message;
+			//Add/update optional header values
+			foreach($optionalHeaders as $name => $value){
+				$headers[$name] = $value;
+           	}
 			$frame = new Frame('NACK', $headers);
 			$this->_writeFrame($frame);
 			return true;