diff --git a/composer.json b/composer.json
index 7f00bf8f77564e4d44e365c3951212de08a9d285..4e244f4abc2734ba06388569f8fd4b9a1c01cec8 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
         "ext-curl": "*",
         "ext-gmp": "*",
         "ext-json": "*",
-        "dbp/relay-core-bundle": "^0.1.51",
+        "dbp/relay-core-bundle": "^0.1.62",
         "guzzlehttp/guzzle": "^7.0",
         "kevinrob/guzzle-cache-middleware": "^3.3 | ^4.0",
         "symfony/framework-bundle": "^5.2",
diff --git a/composer.lock b/composer.lock
index 1fd8ee7825ed5acea5dd2757cd53981d6c67fca6..71e60203e903c49698e3e481d316db5c89ad83b3 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "bf1b5a6f9a4b40dd9a855a73345cf4f5",
+    "content-hash": "4117dec00c6ab0dead123606e4b38bf9",
     "packages": [
         {
             "name": "api-platform/core",
@@ -229,11 +229,11 @@
         },
         {
             "name": "dbp/relay-core-bundle",
-            "version": "v0.1.61",
+            "version": "v0.1.62",
             "source": {
                 "type": "git",
                 "url": "https://gitlab.tugraz.at/dbp/relay/dbp-relay-core-bundle",
-                "reference": "996fc7d43361720e3749401fd0f005ed3d97404b"
+                "reference": "4c468456c2027305e98d59e8b8ed2a6a26fd9a32"
             },
             "require": {
                 "api-platform/core": "^2.6.8 <2.7.0",
@@ -297,7 +297,7 @@
                 "AGPL-3.0-or-later"
             ],
             "description": "The core bundle of the Relay API gateway",
-            "time": "2022-11-23T12:35:13+00:00"
+            "time": "2022-11-29T14:54:53+00:00"
         },
         {
             "name": "doctrine/annotations",
diff --git a/src/Service/AuthorizationDataProvider.php b/src/Service/AuthorizationDataProvider.php
index 43c2b3e74641cf6bf9e860308b6cf9345523062c..8ec13a105b790baf7005272ed7b1f1c8a427c4c9 100644
--- a/src/Service/AuthorizationDataProvider.php
+++ b/src/Service/AuthorizationDataProvider.php
@@ -31,7 +31,7 @@ class AuthorizationDataProvider implements AuthorizationDataProviderInterface
         return array_keys($this->attributeToScopeMap);
     }
 
-    public function getUserAttributes(string $userIdentifier): array
+    public function getUserAttributes(?string $userIdentifier): array
     {
         $userScopes = $this->userSessionProvider->getScopes();
         $userAttributes = [];