diff --git a/composer.json b/composer.json
index 47bc1a704..1f7672224 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "luracast/restler": "3.0.0-RC5",
+        "luracast/restler": "^3.0",
         "bshaffer/oauth2-server-php": "v1.0",
         "colosa/pmUI": "release/3.2-dev",
         "colosa/MichelangeloFE": "release/3.2-dev",
diff --git a/composer.lock b/composer.lock
index 492e7640e..5a4820190 100644
--- a/composer.lock
+++ b/composer.lock
@@ -192,7 +192,7 @@
         },
         {
             "name": "luracast/restler",
-            "version": "3.0.0-RC5",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Luracast/Restler.git",
@@ -267,7 +267,7 @@
                 "rest",
                 "server"
             ],
-            "time": "2015-08-04T07:52:49+00:00"
+            "time": "2017-01-11T03:42:36+00:00"
         },
         {
             "name": "monolog/monolog",
diff --git a/framework/src/Maveriks/Extension/Restler.php b/framework/src/Maveriks/Extension/Restler.php
index e3672fa9d..c4769a9f3 100644
--- a/framework/src/Maveriks/Extension/Restler.php
+++ b/framework/src/Maveriks/Extension/Restler.php
@@ -141,4 +141,53 @@ class Restler extends \Luracast\Restler\Restler
     {
         return $this->workspace;
     }
+
+    protected function call()
+    {
+        $this->dispatch('call');
+        $o = &$this->apiMethodInfo;
+        $accessLevel = max(\Luracast\Restler\Defaults::$apiAccessLevel, $o->accessLevel);
+        $object = \Luracast\Restler\Scope::get($o->className);
+        switch ($accessLevel) {
+            case 3 : //protected method
+                $reflectionMethod = new \ReflectionMethod(
+                    $object,
+                    $o->methodName
+                );
+                $reflectionMethod->setAccessible(true);
+                $result = $reflectionMethod->invokeArgs(
+                    $object,
+                    $o->parameters
+                );
+                break;
+            default :
+                $object = $this->reviewApiExtensions($object, $o->className);
+                $result = call_user_func_array(array(
+                    $object,
+                    $o->methodName
+                ), $o->parameters);
+        }
+        $this->responseData = $result;
+    }
+
+    public function reviewApiExtensions($object, $className)
+    {
+        $classReflection = new \ReflectionClass($object);
+        $classShortName = $classReflection->getShortName();
+        $registry = &\PMPluginRegistry::getSingleton();
+        $pluginsApiExtend = $registry->getExtendsRestService($classShortName);
+        if ($pluginsApiExtend) {
+            $classFilePath = $pluginsApiExtend['filePath'];
+            if (file_exists($classFilePath)) {
+                require_once($classFilePath);
+                $classExtName = $pluginsApiExtend['classExtend'];
+                $newObjectExt = new $classExtName();
+                if (is_subclass_of($newObjectExt, $className)) {
+                    $object = $newObjectExt;
+                }
+            }
+        }
+        return $object;
+    }
+
 }
\ No newline at end of file
diff --git a/workflow/engine/classes/class.plugin.php b/workflow/engine/classes/class.plugin.php
index e4e5c0d6c..675963b6e 100644
--- a/workflow/engine/classes/class.plugin.php
+++ b/workflow/engine/classes/class.plugin.php
@@ -349,6 +349,28 @@ class PMPlugin
         $oPluginRegistry->registerRestService($this->sNamespace);
     }
 
+    /**
+     * Register a extend rest service and expose it
+     *
+     * @param string $className that is name class to extends
+     */
+    function registerExtendsRestService($className)
+    {
+        $oPluginRegistry =& PMPluginRegistry::getSingleton();
+        $oPluginRegistry->registerExtendsRestService($this->sNamespace, $className);
+    }
+
+    /**
+     * Register a extend rest service and expose it
+     *
+     * @param string $className that is name class to extends
+     */
+    function disableExtendsRestService($className)
+    {
+        $oPluginRegistry =& PMPluginRegistry::getSingleton();
+        $oPluginRegistry->disableExtendsRestService($this->sNamespace, $className);
+    }
+
     /**
      * Unregister a rest service
      *
diff --git a/workflow/engine/classes/class.pluginRegistry.php b/workflow/engine/classes/class.pluginRegistry.php
index cd7e0f46d..0061dcb78 100644
--- a/workflow/engine/classes/class.pluginRegistry.php
+++ b/workflow/engine/classes/class.pluginRegistry.php
@@ -117,6 +117,8 @@ class PMPluginRegistry
      */
     private $_restServices = array ();
 
+    private $_restExtendServices = array ();
+
     private $_restServiceEnabled = array();
 
     private static $instance = null;
@@ -427,6 +429,10 @@ class PMPluginRegistry
         if(sizeof( $this->_aOpenReassignCallback )){
             unset( $this->_aOpenReassignCallback );
         }
+
+        if (sizeof($this->_restExtendServices)) {
+            $this->disableExtendsRestService($sNamespace);
+        }
         //unregistering javascripts from this plugin
         $this->unregisterJavascripts( $sNamespace );
         //unregistering rest services from this plugin
@@ -1458,6 +1464,60 @@ class PMPluginRegistry
         return true;
     }
 
+    /**
+     * Register a extend rest service class from a plugin to be served by processmaker
+     *
+     * @param string $sNamespace The namespace for the plugin
+     * @param string $className The service (api) class name
+     */
+    public function registerExtendsRestService($sNamespace, $className)
+    {
+        $baseSrcPluginPath = PATH_PLUGINS . $sNamespace . PATH_SEP . "src";
+        $apiPath = PATH_SEP . "Services" . PATH_SEP . "Ext" . PATH_SEP;
+        $classFile = $baseSrcPluginPath . $apiPath . 'Ext' . $className . '.php';
+        if (file_exists($classFile)) {
+            $this->_restExtendServices[$sNamespace][$className] = array(
+                "filePath" => $classFile,
+                "classParent" => $className,
+                "classExtend" => 'Ext' . $className
+            );
+        }
+    }
+
+    /**
+     * Get a extend rest service class from a plugin to be served by processmaker
+     *
+     * @param string $className The service (api) class name
+     * @return array
+     */
+    public function getExtendsRestService($className)
+    {
+        $responseRestExtendService = array();
+        foreach ($this->_restExtendServices as $sNamespace => $restExtendService) {
+            if (isset($restExtendService[$className])) {
+                $responseRestExtendService = $restExtendService[$className];
+                break;
+            }
+        }
+        return $responseRestExtendService;
+    }
+
+    /**
+     * Remove a extend rest service class from a plugin to be served by processmaker
+     *
+     * @param string $sNamespace
+     * @param string $className The service (api) class name
+     * @return bool
+     */
+    public function disableExtendsRestService($sNamespace, $className = '')
+    {
+        if (isset($this->_restExtendServices[$sNamespace][$className]) && !empty($className)) {
+            unset($this->_restExtendServices[$sNamespace][$className]);
+        } elseif (empty($className)) {
+            unset($this->_restExtendServices[$sNamespace]);
+        }
+    }
+
     /**
      * Unregister a rest service class of a plugin
      *