diff --git a/Models/DashboardBoard.php b/Models/DashboardBoard.php
index 2bc064f..8d348d8 100755
--- a/Models/DashboardBoard.php
+++ b/Models/DashboardBoard.php
@@ -205,7 +205,7 @@ class DashboardBoard implements \JsonSerializable
     /**
      * {@inheritdoc}
      */
-    public function jsonSerialize()
+    public function jsonSerialize() : mixed
     {
         return $this->toArray();
     }
diff --git a/Models/DashboardComponent.php b/Models/DashboardComponent.php
index 6947418..a2a43f5 100755
--- a/Models/DashboardComponent.php
+++ b/Models/DashboardComponent.php
@@ -93,7 +93,7 @@ class DashboardComponent implements \JsonSerializable
     /**
      * {@inheritdoc}
      */
-    public function jsonSerialize()
+    public function jsonSerialize() : mixed
     {
         return $this->toArray();
     }