diff --git a/src/Plugin/search_api/processor/DataFavorites.php b/src/Plugin/search_api/processor/DataFavorites.php
index 42619e1..4a5fe39 100644
--- a/src/Plugin/search_api/processor/DataFavorites.php
+++ b/src/Plugin/search_api/processor/DataFavorites.php
@@ -52,8 +52,8 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
-    return new static(
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): self {
+    return new self(
       $configuration,
       $plugin_id,
       $plugin_definition,