diff --git a/Apache/Solr/Document.php b/Apache/Solr/Document.php
index 0d439ea..5477f51 100644
--- a/Apache/Solr/Document.php
+++ b/Apache/Solr/Document.php
@@ -298,6 +298,7 @@ public function getFieldValues()
 	 * }
 	 * </code>
 	 */
+	#[\ReturnTypeWillChange]
 	public function getIterator()
 	{
 		$arrayObject = new ArrayObject($this->_fields);