diff --git a/src/resources/ElementResource.php b/src/resources/ElementResource.php
index edaee06..32844c9 100644
--- a/src/resources/ElementResource.php
+++ b/src/resources/ElementResource.php
@@ -75,6 +75,11 @@ class ElementResource extends BaseObject implements ResourceAdapterInterface
      */
     public $meta;
 
+    /**
+     * @var bool|int|string Whether the output should be cached, and for how long.
+     */
+    public $cache = false;
+
     // Public Methods
     // =========================================================================