diff --git a/composer.json b/composer.json
index 0741c8a..c7107fe 100644
--- a/composer.json
+++ b/composer.json
@@ -149,4 +149,4 @@
         "chrome",
         "firefox"
     ]
-}
\ No newline at end of file
+}
diff --git a/src/Action/RegisterSubscriptionAction.php b/src/Action/RegisterSubscriptionAction.php
index 100584c..44e5fdf 100644
--- a/src/Action/RegisterSubscriptionAction.php
+++ b/src/Action/RegisterSubscriptionAction.php
@@ -3,9 +3,9 @@
 namespace BenTools\WebPushBundle\Action;
 
 use BenTools\WebPushBundle\Model\Subscription\UserSubscriptionManagerRegistry;
+use BenTools\WebPushBundle\Model\User\AnonymousUser;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
 use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
 use Symfony\Component\Security\Core\User\UserInterface;
@@ -49,10 +49,6 @@ private function unsubscribe(UserInterface $user, string $subscriptionHash): voi
 
     public function __invoke(Request $request, UserInterface $user = null): Response
     {
-        if (null === $user) {
-            throw new AccessDeniedHttpException('Not authenticated.');
-        }
-
         if (!in_array($request->getMethod(), ['POST', 'DELETE'])) {
             throw new MethodNotAllowedHttpException(['POST', 'DELETE']);
         }
@@ -60,6 +56,7 @@ public function __invoke(Request $request, UserInterface $user = null): Response
         $data = json_decode($request->getContent(), true);
         $subscription = $data['subscription'] ?? [];
         $options = $data['options'] ?? [];
+        $user ??= new AnonymousUser();
 
         if (JSON_ERROR_NONE !== json_last_error()) {
             throw new BadRequestHttpException(json_last_error_msg());
diff --git a/src/Model/User/AnonymousUser.php b/src/Model/User/AnonymousUser.php
new file mode 100644
index 0000000..616cd10
--- /dev/null
+++ b/src/Model/User/AnonymousUser.php
@@ -0,0 +1,38 @@
+<?php
+
+
+namespace BenTools\WebPushBundle\Model\User;
+
+use Symfony\Component\Security\Core\User\UserInterface;
+
+/**
+ * This class is used to support anonymous user subscription
+ *
+ * @internal
+ */
+final class AnonymousUser implements UserInterface
+{
+    public function getRoles(): array
+    {
+        return [];
+    }
+
+    public function getPassword(): ?string
+    {
+        return null;
+    }
+
+    public function getSalt(): ?string
+    {
+        return null;
+    }
+
+    public function getUsername(): string
+    {
+        return '';
+    }
+
+    public function eraseCredentials(): void
+    {
+    }
+}