diff --git a/CloudObjects/SDK/ObjectRetriever.php b/CloudObjects/SDK/ObjectRetriever.php
index 8ac6eb0..c19aa4d 100644
--- a/CloudObjects/SDK/ObjectRetriever.php
+++ b/CloudObjects/SDK/ObjectRetriever.php
@@ -536,7 +536,7 @@ class ObjectRetriever implements CustomCacheAndLogInterface {
 	 * @deprecated Use getAuthenticatingNamespaceObjectNode() instead
 	 * @return Node
 	 */
-	public function getAuthenticatingNamespaceObject() : Node {
+	public function getAuthenticatingNamespaceObject() : ?Node {
 		return $this->getObject($this->assertAuthenticatingNamespaceAndGetId());
 	}
 
@@ -546,7 +546,7 @@ class ObjectRetriever implements CustomCacheAndLogInterface {
 	 * 
 	 * @return Node
 	 */
-	public function getAuthenticatingNamespaceObjectNode() : Node {
+	public function getAuthenticatingNamespaceObjectNode() : ?Node {
 		return $this->getObject($this->assertAuthenticatingNamespaceAndGetId());
 	}
 
@@ -556,7 +556,7 @@ class ObjectRetriever implements CustomCacheAndLogInterface {
 	 * 
 	 * @return CloudObject
 	 */
-	public function getAuthenticatingNamespaceCloudObject() : CloudObject {
+	public function getAuthenticatingNamespaceCloudObject() : ?CloudObject {
 		return $this->getCloudObject($this->assertAuthenticatingNamespaceAndGetId());
 	}