diff --git a/Symfony/src/AppBundle/Controller/DashboardController.php b/Symfony/src/AppBundle/Controller/DashboardController.php
index cbc605a..1ec243d 100644
--- a/Symfony/src/AppBundle/Controller/DashboardController.php
+++ b/Symfony/src/AppBundle/Controller/DashboardController.php
@@ -19,8 +19,11 @@ public function showAction($messages = [])
         $tier = $this->getDoctrine()
             ->getRepository('AppBundle:Tier')
             ->find($user->getTier());
+        $tiers = $this->getDoctrine()
+            ->getRepository('AppBundle:Tier')
+            ->findAll();
 
         return $this->render('AppBundle:Dashboard:index.html.twig',
-            array('user' => $user, 'firmwares' => $firmwares, 'tier' => $tier, 'messages' => $messages));
+            array('user' => $user, 'firmwares' => $firmwares, 'tier' => $tier, 'tiers' => $tiers, 'messages' => $messages));
     }
 }
diff --git a/Symfony/src/AppBundle/Controller/RegisterController.php b/Symfony/src/AppBundle/Controller/RegisterController.php
index 8824593..077a49d 100644
--- a/Symfony/src/AppBundle/Controller/RegisterController.php
+++ b/Symfony/src/AppBundle/Controller/RegisterController.php
@@ -22,13 +22,17 @@ public function registerAction(Request $request)
         if ($form->isSubmitted() && $form->isValid() && count($errors) == 0) {
             $password = $this->get('security.password_encoder')->encodePassword($user, $user->getPassword());
             $user->setPassword($password)->setSuccessfulFlashCount(0)->setTotalFlashCount(0)->setTier(0);
-            $entityManager = $this->getDoctrine()->getManager();
-            $entityManager->persist($user);
-            $entityManager->flush();
-            $token = new UsernamePasswordToken($user, null, 'login', $user->getRoles());
-            $this->get('security.token_storage')->setToken($token);
-            $messages = ["You have been registered!"];
-            return $this->forward('AppBundle:Dashboard:show', array('messages' => $messages));
+            try {
+                $entityManager = $this->getDoctrine()->getManager();
+                $entityManager->persist($user);
+                $entityManager->flush();
+                $token = new UsernamePasswordToken($user, null, 'login', $user->getRoles());
+                $this->get('security.token_storage')->setToken($token);
+                $messages = ["You have been registered!"];
+                return $this->forward('AppBundle:Dashboard:show', array('messages' => $messages));
+            } catch(\Exception $e){
+                $errors = $e;
+            }
         }
 
         return $this->render('AppBundle:Register:index.html.twig', array('form' => $form->createView(), 'errors' => $errors));
diff --git a/Symfony/src/AppBundle/Controller/UpdateTierController.php b/Symfony/src/AppBundle/Controller/UpdateTierController.php
new file mode 100644
index 0000000..f7ca9e6
--- /dev/null
+++ b/Symfony/src/AppBundle/Controller/UpdateTierController.php
@@ -0,0 +1,25 @@
+<?php
+namespace AppBundle\Controller;
+
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class UpdateTierController extends Controller
+{
+    /**
+     * @Route("/update_tier/{owner}", name="update_tier")
+     */
+    public function updateAction(Request $request, $owner)
+    {
+        $data = $request->request->all();
+        $entityManager = $this->getDoctrine()->getManager();
+        $user = $entityManager->getRepository('AppBundle:User')->find($owner);
+        if ($data["tier"] !== null && $data["tier"] > 0) {
+            $user->setTier($data["tier"]);
+        }
+        $entityManager->flush();
+        return new Response();
+    }
+}
diff --git a/Symfony/src/AppBundle/Entity/User.php b/Symfony/src/AppBundle/Entity/User.php
index 0d5bdbb..ddaaba1 100644
--- a/Symfony/src/AppBundle/Entity/User.php
+++ b/Symfony/src/AppBundle/Entity/User.php
@@ -6,12 +6,14 @@
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Validator\Constraints as Assert;
 use Doctrine\Common\Collections\ArrayCollection;
+use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 
 /**
  * User
  *
  * @ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository")
- *
+ * @UniqueEntity(fields="email", message="Email is already in use")
+ * @UniqueEntity(fields="username", message="Username is already in use")
  * @SuppressWarnings(PHPMD.ShortVariable)
  */
 class User implements UserInterface, \Serializable
diff --git a/Symfony/src/AppBundle/Resources/views/Dashboard/index.html.twig b/Symfony/src/AppBundle/Resources/views/Dashboard/index.html.twig
index 06cb543..7f59e75 100644
--- a/Symfony/src/AppBundle/Resources/views/Dashboard/index.html.twig
+++ b/Symfony/src/AppBundle/Resources/views/Dashboard/index.html.twig
@@ -15,7 +15,17 @@
             {% if tier != null %}
                 Your current tier is {{ tier.tierName }}.
             {% endif %}
-        </h3><br>
+        </h3>
+        <select id="changeTier" onChange="tierValueChanged()">
+            <option value="0" disabled selected hidden>
+                Change your tier
+            </option>
+            {% for curtier in tiers %}
+                <option value="{{ curtier.id }}" >
+                    {{ curtier.tierName }}
+                </option>
+            {% endfor %}
+        </select><br><br>
         <div class="table-responsive">
             <table class="table table-condensed table-striped table-hover table-bordered">
                 <tbody>
@@ -89,6 +99,7 @@
 {% block javascripts %}
     <script src="{{ asset('//cdnjs.cloudflare.com/ajax/libs/lightbox2/2.8.2/js/lightbox.min.js') }}"></script>
     <script src="{{ asset('//cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.5.8/clipboard.min.js') }}"></script>
+    {% include 'AppBundle:Dashboard:js.html.twig' %}
     <script type="text/javascript">
         $(document).ready(function ($) {
             new Clipboard('.btn');
diff --git a/Symfony/src/AppBundle/Resources/views/Dashboard/js.html.twig b/Symfony/src/AppBundle/Resources/views/Dashboard/js.html.twig
new file mode 100644
index 0000000..ce136f4
--- /dev/null
+++ b/Symfony/src/AppBundle/Resources/views/Dashboard/js.html.twig
@@ -0,0 +1,14 @@
+<script>
+    function tierValueChanged() {
+        $.ajax({
+            type: "POST",
+            url: "{{ path('update_tier', {'owner': user.id }) }}",
+            data: {
+                'tier': $("#changeTier").val()
+            }
+        }).done(function () {
+            $("#changeTier").val(0);
+            location.reload();
+        });
+    }
+</script>
diff --git a/Symfony/src/AppBundle/Resources/views/Register/index.html.twig b/Symfony/src/AppBundle/Resources/views/Register/index.html.twig
index 0654b21..c4637f2 100644
--- a/Symfony/src/AppBundle/Resources/views/Register/index.html.twig
+++ b/Symfony/src/AppBundle/Resources/views/Register/index.html.twig
@@ -47,10 +47,14 @@
                                 </div>
                                 <p class="help-block">Please confirm password</p>
                             </div>
+                            <div id="differentPasswordAlert" class="alert alert-danger alert-dismissible"
+                                 style="" role="alert">
+                                Passwords do not match!
+                            </div>
                             <br>
                             <div class="control-group">
                                 <div class="controls">
-                                    <button class="btn btn-lg btn-primary btn-block" type="submit"
+                                    <button id="registerButton" class="btn btn-lg btn-primary btn-block" type="submit"
                                             name="register-button">Register
                                     </button>
                                 </div>
@@ -63,3 +67,7 @@
         </div>
     </div>
 {% endblock %}
+
+{% block javascripts %}
+    {% include 'AppBundle:Register:js.html.twig' %}
+{% endblock %}
diff --git a/Symfony/src/AppBundle/Resources/views/Register/js.html.twig b/Symfony/src/AppBundle/Resources/views/Register/js.html.twig
new file mode 100644
index 0000000..a2d69bb
--- /dev/null
+++ b/Symfony/src/AppBundle/Resources/views/Register/js.html.twig
@@ -0,0 +1,17 @@
+<script>
+    $(document).ready(function () {
+        $("#registerButton").prop('disabled', true);
+        $("#registration_password_second").keyup(checkPasswordMatch);
+    });
+    function checkPasswordMatch() {
+        var password = $("#registration_password_first").val();
+        var confirmPassword = $("#registration_password_second").val();
+        if (password == confirmPassword) {
+            $("#differentPasswordAlert").fadeOut(500);
+            $("#registerButton").prop('disabled', false);
+            return;
+        }
+        $("#registerButton").prop('disabled', true);
+        $("#differentPasswordAlert").show();
+    }
+</script>
diff --git a/Symfony/src/AppBundle/Resources/views/Tier/index.html.twig b/Symfony/src/AppBundle/Resources/views/Tier/index.html.twig
index b048ef2..e4b6b7f 100644
--- a/Symfony/src/AppBundle/Resources/views/Tier/index.html.twig
+++ b/Symfony/src/AppBundle/Resources/views/Tier/index.html.twig
@@ -26,7 +26,7 @@
                             <div class="panel-body text-center">
                                 <p class="lead" style="font-size:40px"><strong>
                                         {% if tier.price > 0 %}
-                                            {{ tier.price|price }} <br> / month
+                                            {{ tier.price|price(2) }} <br> / month
                                         {% else %}
                                             FREE!
                                             <br><br>
diff --git a/Symfony/tests/AppBundle/Controller/RegisterControllerTest.php b/Symfony/tests/AppBundle/Controller/RegisterControllerTest.php
index af33669..2fc6fc4 100644
--- a/Symfony/tests/AppBundle/Controller/RegisterControllerTest.php
+++ b/Symfony/tests/AppBundle/Controller/RegisterControllerTest.php
@@ -28,7 +28,7 @@ public function testRegisterProcess()
         $this->assertEquals(200, $client->getResponse()->getStatusCode());
 
         $crawler = $client->submit($form);
-        $this->assertEquals(500, $client->getResponse()->getStatusCode());
-        $this->assertContains("Duplicate entry 'alexyao999'", $crawler->text());
+        $this->assertEquals(200, $client->getResponse()->getStatusCode());
+        $this->assertContains("is already in use", $crawler->text());
     }
 }