diff --git a/src/WidgetSystem/RestController.php b/src/WidgetSystem/RestController.php
index e2414e1b..d2388e1d 100644
--- a/src/WidgetSystem/RestController.php
+++ b/src/WidgetSystem/RestController.php
@@ -35,8 +35,11 @@ final class RestController extends \WP_REST_Controller {
 		return is_string($value) && WidgetRegistry::get($value) !== null;
 	}
 
-	/** @return \WP_REST_Response|\WP_Error */
-	public function get_items(\WP_REST_Request $request) {
+	/**
+	 * @param \WP_REST_Request $request Request object.
+	 * @return \WP_REST_Response|\WP_Error
+	 */
+	public function get_items($request) {
 		$unknown = array_diff(array_keys($request->get_params()), ['widget', 'instance', 'page', 'segment']);
 		if ($unknown) {
 			return new \WP_Error('aksrt_widget_unknown_parameter', __('请求包含不支持的参数。', 'aksrt'), ['status' => 400, 'parameters' => array_values($unknown)]);