diff --git a/src/factory/object/RequestObj.php b/src/factory/object/RequestObj.php
index 36a9950..6497a8b 100644
--- a/src/factory/object/RequestObj.php
+++ b/src/factory/object/RequestObj.php
@@ -4,7 +4,7 @@ namespace Tansilu\HfPayLib\factory\object;
 
 trait RequestObj
 {
-    private array $data;
+    private array $data = [];
 
     public function __set($name, $value)
     {
diff --git a/src/factory/object/ResponseObj.php b/src/factory/object/ResponseObj.php
index bf334b1..97c8b03 100644
--- a/src/factory/object/ResponseObj.php
+++ b/src/factory/object/ResponseObj.php
@@ -11,7 +11,7 @@ trait ResponseObj
         return $self;
     }
 
-    private array $data;
+    private array $data = [];
 
     public function __get($name)
     {