diff --git a/ruleset.xml b/ruleset.xml
index 585d73c3..4298acde 100644
--- a/ruleset.xml
+++ b/ruleset.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <ruleset>
 	<!-- Contributte Coding Standard -->
-	<rule ref="./vendor/contributte/qa/ruleset-8.0.xml">
+	<rule ref="./vendor/contributte/qa/ruleset-8.1.xml">
 		<exclude name="Squiz.PHP.Heredoc.NotAllowed"/>
 		<exclude name="Squiz.Commenting.FunctionComment.InvalidTypeHint"/>
 		<exclude name="SlevomatCodingStandard.ControlStructures.EarlyExit.EarlyExitNotUsed"/>
diff --git a/src/DataSource/DoctrineCollectionDataSource.php b/src/DataSource/DoctrineCollectionDataSource.php
index 17047239..37af4f7b 100755
--- a/src/DataSource/DoctrineCollectionDataSource.php
+++ b/src/DataSource/DoctrineCollectionDataSource.php
@@ -23,8 +23,7 @@ final class DoctrineCollectionDataSource extends FilterableDataSource implements
 	IAggregatable
 {
 
-	/** @var Collection&Selectable */
-	protected $dataSource;
+	protected Selectable&Collection $dataSource;
 
 	protected Criteria $criteria;