diff --git a/src/main/php/Gomoob/Pushwoosh/Model/Notification/Notification.php b/src/main/php/Gomoob/Pushwoosh/Model/Notification/Notification.php
index 152b6f7..df3c19a 100644
--- a/src/main/php/Gomoob/Pushwoosh/Model/Notification/Notification.php
+++ b/src/main/php/Gomoob/Pushwoosh/Model/Notification/Notification.php
@@ -260,6 +260,13 @@ class Notification implements \JsonSerializable
      */
     private $wP;
 
+    /**
+     * List of strings that contains the users' identifiers responsible to filter who will receive the notification.
+     *
+     * @var array
+     */
+    private $users;
+
     /**
      * Utility function used to create a new notification.
      *
@@ -647,7 +654,17 @@ public function getWP()
     {
         return $this->wP;
     }
-    
+
+    /**
+     * Gets the list of strings that contains the users' identifiers responsible to filter who will receive the notification.
+     *
+     * @return string[] string list of users identifiers
+     */
+    public function getUsers()
+    {
+        return $this->users;
+    }
+
     /**
      * Creates a JSON representation of this request.
      *
@@ -674,6 +691,7 @@ public function jsonSerialize()
         isset($this->richPageId) ? $json['rich_page_id'] = $this->richPageId : false;
         isset($this->sendRate)? $json['send_rate'] = $this->sendRate : false;
         isset($this->timezone)? $json['timezone'] = $this->timezone : false;
+        isset($this->users)? $json['users'] = $this->users : false;
 
         if (isset($this->conditions)) {
             $conditionsArray = [];
@@ -1162,4 +1180,18 @@ public function setWP(WP $wP)
 
         return $this;
     }
+
+    /**
+     * Sets the list of users identifiers
+     *
+     * @param array $users
+     *
+     * @return \Gomoob\Pushwoosh\Model\Notification\Notification this instance.
+     */
+    public function setUsers($users)
+    {
+        $this->users = $users;
+
+        return $this;
+    }
 }
diff --git a/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php b/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
index 244e711..4ea9100 100644
--- a/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
+++ b/src/test/php/Gomoob/Pushwoosh/Model/Notification/NotificationTest.php
@@ -451,6 +451,18 @@ public function testIsSetIgnoreUserTimezone()
         $this->assertFalse($notification->isIgnoreUserTimezone());
     }
 
+    /**
+     * Test method for the `getUsers()` and `setUsers($users)` functions.
+     */
+    public function testGetSetUsers()
+    {
+        $notification = new Notification();
+        $this->assertEmpty($notification->getUsers());
+        $users = ['1', '2', '3', '4'];
+        $this->assertSame($notification, $notification->setUsers($users));
+        $this->assertSame($users, $notification->getUsers());
+    }
+
     /**
      * Test method for the `jsonSerialize()` function.
      */
@@ -587,10 +599,11 @@ public function testJsonSerialize()
                     ->setCount(3)
                     ->setType('Tile')
             )
+            ->setUsers(['1', '2', '3'])
             ->jsonSerialize();
 
         // Test the generic properties
-        $this->assertCount(65, $array);
+        $this->assertCount(66, $array);
         $this->assertSame('now', $array['send_date']);
         $this->assertSame('America/New_York', $array['timezone']);
         $this->assertTrue($array['ignore_user_timezone']);
@@ -635,6 +648,7 @@ public function testJsonSerialize()
         $this->assertSame('value1', $array['conditions'][2][2][1]);
         $this->assertSame('value2', $array['conditions'][2][2][2]);
         $this->assertSame('CAMPAIGN', $array['campaign']);
+        $this->assertSame(['1', '2', '3'], $array['users']);
 
         // Test the ADM parameters
         $this->assertSame('http://example.com/banner.png', $array['adm_banner']);