diff --git a/src/auth/passkeys/CredentialRepository.php b/src/auth/passkeys/CredentialRepository.php
index efdbe4887d6..18292a997ed 100644
--- a/src/auth/passkeys/CredentialRepository.php
+++ b/src/auth/passkeys/CredentialRepository.php
@@ -25,6 +25,17 @@
  */
 class CredentialRepository implements PublicKeyCredentialSourceRepository
 {
+    /**
+     * @var WebauthnServer
+     */
+    private WebauthnServer $_webauthnServer;
+
+
+    public function __construct()
+    {
+        $this->_webauthnServer = new WebauthnServer();
+    }
+
     /**
      * @inheritdoc
      */
@@ -33,7 +44,13 @@ public function findOneByCredentialId(string $publicKeyCredentialId): ?PublicKey
         $record = $this->_findByCredentialId($publicKeyCredentialId);
 
         if ($record) {
-            return PublicKeyCredentialSource::createFromArray(Json::decodeIfJson($record->credential));
+            $serializer = $this->_webauthnServer->getSerializer();
+
+            return $serializer->deserialize(
+                $record->credential,
+                PublicKeyCredentialSource::class,
+                'json',
+            );
         }
 
         return null;
@@ -50,8 +67,13 @@ public function findAllForUserEntity(PublicKeyCredentialUserEntity $publicKeyCre
         $keySources = [];
         if ($user && $user->id) {
             $records = WebAuthn::findAll(['userId' => $user->id]);
+            $serializer = $this->_webauthnServer->getSerializer();
             foreach ($records as $record) {
-                $keySources[] = PublicKeyCredentialSource::createFromArray(Json::decodeIfJson($record->credential));
+                $keySources[] = $serializer->deserialize(
+                    $record->credential,
+                    PublicKeyCredentialSource::class,
+                    'json',
+                );
             }
         }
 
@@ -66,7 +88,7 @@ public function findAllForUserEntity(PublicKeyCredentialUserEntity $publicKeyCre
      */
     public function savedNamedCredentialSource(PublicKeyCredentialSource $publicKeyCredentialSource, ?string $credentialName = null): void
     {
-        $publicKeyCredentialId = $publicKeyCredentialSource->getPublicKeyCredentialId();
+        $publicKeyCredentialId = $publicKeyCredentialSource->publicKeyCredentialId;
         $record = $this->_findByCredentialId($publicKeyCredentialId);
 
         if (!$record) {
diff --git a/src/auth/passkeys/WebauthnServer.php b/src/auth/passkeys/WebauthnServer.php
index e56eee5ff3e..63f73448cac 100644
--- a/src/auth/passkeys/WebauthnServer.php
+++ b/src/auth/passkeys/WebauthnServer.php
@@ -25,7 +25,6 @@
 use Webauthn\AuthenticatorAttestationResponseValidator;
 use Webauthn\AuthenticatorSelectionCriteria;
 use Webauthn\Denormalizer\WebauthnSerializerFactory;
-use Webauthn\PublicKeyCredentialLoader;
 use Webauthn\PublicKeyCredentialParameters;
 use Webauthn\TokenBinding\IgnoreTokenBindingHandler;
 
@@ -45,6 +44,7 @@ class WebauthnServer
      *
      * @return IgnoreTokenBindingHandler
      * @see https://webauthn-doc.spomky-labs.com/v/v4.5/pure-php/the-hard-way#token-binding-handler
+     * todo: remove when updating to web-auth 5.0
      */
     public function getTokenBindingHandler(): IgnoreTokenBindingHandler
     {
@@ -81,19 +81,6 @@ public function getAttestationObjectLoader(): AttestationObjectLoader
         );
     }
 
-    /**
-     * Returns the object that will load the Public Key.
-     *
-     * @return PublicKeyCredentialLoader
-     * @see https://webauthn-doc.spomky-labs.com/pure-php/the-hard-way#public-key-credential-loader
-     */
-    public function getPublicKeyCredentialLoader(): PublicKeyCredentialLoader
-    {
-        return PublicKeyCredentialLoader::create(
-            $this->getAttestationObjectLoader()
-        );
-    }
-
     /**
      * Return the Symphony Serializer that will deal with serialization/deserialization of data.
      *
@@ -158,8 +145,8 @@ public function getAuthenticatorAttestationResponseValidator(): AuthenticatorAtt
     {
         return AuthenticatorAttestationResponseValidator::create(
             $this->getAttestationStatementManager(),
-            new CredentialRepository(),
-            $this->getTokenBindingHandler(),
+            new CredentialRepository(), // todo: set to null when updating to web-auth 5.0
+            $this->getTokenBindingHandler(), // todo: set to null when updating to web-auth 5.0
             $this->getExtensionOutputCheckerHandler(),
         );
     }
@@ -174,8 +161,8 @@ public function getAuthenticatorAssertionResponseValidator(): AuthenticatorAsser
     {
         return AuthenticatorAssertionResponseValidator::create(
             new CredentialRepository(),
-            $this->getTokenBindingHandler(),
-            $this->getExtensionOutputCheckerHandler(),
+            $this->getTokenBindingHandler(), // todo: set to null when updating to web-auth 5.0
+            $this->getExtensionOutputCheckerHandler(), // todo: set to null when updating to web-auth 5.0
             $this->getAlgorithmManager(),
         );
     }
diff --git a/src/services/Auth.php b/src/services/Auth.php
index 466fe2a8739..864655f862c 100644
--- a/src/services/Auth.php
+++ b/src/services/Auth.php
@@ -450,7 +450,12 @@ public function verifyPasskeyCreationResponse(string $credentials, ?string $cred
 
         $serializer = $this->webauthnServer()->getSerializer();
 
-        $publicKeyCredentialCreationOptions = PublicKeyCredentialCreationOptions::createFromArray(Json::decode($optionsJson));
+        $publicKeyCredentialCreationOptions = $serializer->deserialize(
+            $optionsJson,
+            PublicKeyCredentialCreationOptions::class,
+            'json',
+        );
+
         $publicKeyCredential = $serializer->deserialize(
             $credentials,
             PublicKeyCredential::class,
@@ -506,14 +511,20 @@ public function verifyPasskey(
         PublicKeyCredentialRequestOptions|array|string $requestOptions,
         string $response,
     ): bool {
-        if (is_array($requestOptions)) {
-            $requestOptions = PublicKeyCredentialRequestOptions::createFromArray($requestOptions);
-        } elseif (is_string($requestOptions)) {
-            $requestOptions = PublicKeyCredentialRequestOptions::createFromString($requestOptions);
-        }
+        $serializer = $this->webauthnServer()->getSerializer();
+
+        $requestOptions = $serializer->deserialize(
+            $requestOptions,
+            PublicKeyCredentialRequestOptions::class,
+            'json',
+        );
 
         $userEntity = $this->passkeyUserEntity($user);
-        $publicKeyCredential = $this->webauthnServer()->getPublicKeyCredentialLoader()->load($response);
+        $publicKeyCredential = $serializer->deserialize(
+            $response,
+            PublicKeyCredential::class,
+            'json',
+        );
         $authenticatorAssertionResponse = $publicKeyCredential->response;
 
         if (!$authenticatorAssertionResponse instanceof AuthenticatorAssertionResponse) {
@@ -571,13 +582,11 @@ private function webauthnServer(): WebauthnServer
      */
     private function passkeyUserEntity(User $user): PublicKeyCredentialUserEntity
     {
-        $data = [
-            'name' => $user->email,
-            'id' => Base64UrlSafe::encodeUnpadded($user->uid),
-            'displayName' => $user->getName(),
-        ];
-
-        return PublicKeyCredentialUserEntity::createFromArray($data);
+        return PublicKeyCredentialUserEntity::create(
+            $user->email,
+            Base64UrlSafe::encodeUnpadded($user->uid),
+            $user->getName(),
+        );
     }
 
     /**
@@ -587,9 +596,9 @@ private function passkeyUserEntity(User $user): PublicKeyCredentialUserEntity
      */
     private function passkeyRpEntity(): PublicKeyCredentialRpEntity
     {
-        return PublicKeyCredentialRpEntity::createFromArray([
-            'name' => Craft::$app->getSystemName(),
-            'id' => Craft::$app->getRequest()->getHostName(),
-        ]);
+        return PublicKeyCredentialRpEntity::create(
+            Craft::$app->getSystemName(),
+            Craft::$app->getRequest()->getHostName(),
+        );
     }
 }