diff --git a/src/Util/IJsonSerializable.php b/src/Util/IJsonSerializable.php
index 9c7c613..895abac 100644
--- a/src/Util/IJsonSerializable.php
+++ b/src/Util/IJsonSerializable.php
@@ -18,6 +18,11 @@
  */
 interface IJsonSerializable extends JsonSerializable
 {
+    /**
+     * @param  array<string, mixed>  $array
+     */
+    public function __construct(array $array);
+
     /**
      * Decode a formerly JSON encoded object.
      * @param  string  $json JSON encoded object.