diff --git a/Models/NullReport.php b/Models/NullReport.php
index 3612e9a..8ef2ef6 100755
--- a/Models/NullReport.php
+++ b/Models/NullReport.php
@@ -36,4 +36,12 @@ final class NullReport extends Report
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }
diff --git a/Models/NullTemplate.php b/Models/NullTemplate.php
index 0354b41..47d9c12 100755
--- a/Models/NullTemplate.php
+++ b/Models/NullTemplate.php
@@ -36,4 +36,12 @@ final class NullTemplate extends Template
         $this->id = $id;
         parent::__construct();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : mixed
+    {
+        return ['id' => $this->id];
+    }
 }