diff --git a/modules/licenses.js b/modules/licenses.js
index 3d1d67d..b37cdb4 100644
--- a/modules/licenses.js
+++ b/modules/licenses.js
@@ -8,13 +8,13 @@ var Licenses = function(config) {
 /**
  * Add License -
  * The Add License function can be used to generate a new WHMCS License Key.
- * @param type - License type (branding/nobranding)
+ * @param product - product type (starter , plus , professional or business)
  * @param callback
  */
-Licenses.prototype.addLicense = function (type, callback) {
+Licenses.prototype.addLicense = function(product, callback) {
   var options = {
     action: 'addlicense',
-    type: type || 'branding',
+    product: product || 'starter',
     responsetype: 'xml'
   };
 
@@ -26,6 +26,74 @@ Licenses.prototype.addLicense = function (type, callback) {
   utils.modem(createOptions, callback, true);
 };
 
+/**
+ * Upgrade License -
+ * Upgrade or downgrade a given license to a new product.
+ * @param key - The license key to be upgraded/downgraded
+ * @param product - product type (starter , plus , professional or business)
+ * @param callback
+ */
+Licenses.prototype.upgradeLicense = function(key, product, callback) {
+  var options = {
+    key: key,
+    action: 'upgrade',
+    product: product,
+    responsetype: 'xml'
+  };
+
+  var createOptions = {
+    client: this,
+    body: options
+  };
+
+  utils.modem(createOptions, callback, true);
+};
+
+/**
+ * Downgrade License -
+ * Alias of Upgrade License.
+ * @param key - The license key to be upgraded/downgraded
+ * @param product - product type (starter , plus , professional or business)
+ * @param callback
+ */
+Licenses.prototype.downgradeLicense = function(key, product, callback) {
+  Licenses.prototype.upgradeLicense(key, product, callback);
+};
+
+/**
+ * Upgrade License and Reissue -
+ * Upgrade or downgrade a given license to a new product and reissue it ready for installation to a new location.
+ * @param key - The license key to be upgraded/downgraded
+ * @param product - product type (starter , plus , professional or business)
+ * @param callback
+ */
+Licenses.prototype.upgradeReissueLicense = function(key, product, callback) {
+  var options = {
+    key: key,
+    action: 'upgradeandreissue',
+    product: product,
+    responsetype: 'xml'
+  };
+
+  var createOptions = {
+    client: this,
+    body: options
+  };
+
+  utils.modem(createOptions, callback, true);
+};
+
+/**
+ * Downgrade License and Reissue -
+ * Alias of Upgrade License.
+ * @param key - The license key to be upgraded/downgraded
+ * @param product - product type (starter , plus , professional or business)
+ * @param callback
+ */
+Licenses.prototype.downgradeReissueLicense = function(key, product, callback) {
+  Licenses.prototype.upgradeReissueLicense(key, product, callback);
+};
+
 /**
  * Cancel License -
  * This will cancel an active WHMCS License Key and prevent it from being billed
@@ -33,7 +101,7 @@ again. It will terminate it immediately and not allow it to be reactivated.
  * @param key - License Key to be cancelled
  * @param callback
  */
-Licenses.prototype.cancelLicense = function (key, callback) {
+Licenses.prototype.cancelLicense = function(key, callback) {
   var options = {
     action: 'cancel',
     key: key,
@@ -56,7 +124,7 @@ The no branding status will be true/false. And the license status either Active,
 Reissued, or Suspended. Expired keys are excluded.
  * @param callback
  */
-Licenses.prototype.listLicenses = function (callback) {
+Licenses.prototype.listLicenses = function(callback) {
   var options = {
     action: 'listlicenses',
     responsetype: 'xml'
@@ -78,7 +146,7 @@ the associated installation.
  * @param key - License Key to be reissued.
  * @param callback
  */
-Licenses.prototype.reissueLicense = function (key, callback) {
+Licenses.prototype.reissueLicense = function(key, callback) {
   var options = {
     action: 'reissue',
     key: key,
@@ -104,17 +172,17 @@ key.
  * @param [opts.directory] Comma separated list of allowed directories
  * @param callback
  */
-Licenses.prototype.modifyLicense = function (key, opts, callback) {
+Licenses.prototype.modifyLicense = function(key, opts, callback) {
   var options = {
     action: 'modify',
     key: key,
     responsetype: 'xml'
   };
 
-  if(typeof opts === 'function'){
+  if (typeof opts === 'function') {
     callback = opts;
   } else {
-    options = extend(options,opts);
+    options = extend(options, opts);
   }
 
   var createOptions = {
@@ -130,16 +198,16 @@ Licenses.prototype.modifyLicense = function (key, opts, callback) {
  * The Get Pricing can be used to retrieve pricing information for your account.
  * @param callback
  */
-Licenses.prototype.getPricingLicense = function (callback) {
+Licenses.prototype.getPricingLicense = function(callback) {
   var options = {
     action: 'getpricing',
     responsetype: 'xml'
   };
 
-  if(typeof opts === 'function'){
+  if (typeof opts === 'function') {
     callback = opts;
   } else {
-    options = extend(options,opts);
+    options = extend(options, opts);
   }
 
   var createOptions = {
@@ -162,16 +230,16 @@ At least one criteria must be submitted.
  * @param [opts.ipaddr] (Optional) Obtain results of a specific IP address
  * @param callback
  */
-Licenses.prototype.searchLicense = function (opts, callback) {
+Licenses.prototype.searchLicense = function(opts, callback) {
   var options = {
     action: 'searchlicenses',
     responsetype: 'xml'
   };
 
-  if(typeof opts === 'function'){
+  if (typeof opts === 'function') {
     callback = opts;
   } else {
-    options = extend(options,opts);
+    options = extend(options, opts);
   }
 
   var createOptions = {
@@ -189,7 +257,7 @@ Licenses.prototype.searchLicense = function (opts, callback) {
  * @param key License Key
  * @param callback
  */
-Licenses.prototype.brandingLicense = function (action, key, callback) {
+Licenses.prototype.brandingLicense = function(action, key, callback) {
   // action The function to perform [brandingenable/brandingdisable]
   if (action && action === true) {
     action = 'brandingenable';