diff --git a/src/Controller/OAuthController.php b/src/Controller/OAuthController.php
index abd7a70..0156209 100644
--- a/src/Controller/OAuthController.php
+++ b/src/Controller/OAuthController.php
@@ -59,6 +59,7 @@ class OAuthController
             'iat' => (int)$token->getCreatedDate()->getTimestamp(),
             'nbf' => (int)$token->getCreatedDate()->getTimestamp(),
             'exp' => (int)$token->getExpiresDate()->getTimestamp(),
+            'aud' => $clientId,
             'nonce' => $token->getNonce()
         ], $this->getUserInfoInternal(
             $this->userRepository->getById($token->getUserId()),