diff --git a/src/Flow/JSONPath/JSONPath.php b/src/Flow/JSONPath/JSONPath.php
index 1e2bcde..b6d992f 100644
--- a/src/Flow/JSONPath/JSONPath.php
+++ b/src/Flow/JSONPath/JSONPath.php
@@ -21,12 +21,22 @@ class JSONPath implements ArrayAccess, Iterator, JsonSerializable, Countable
      * @param $data
      * @param int $options
      */
-    public function __construct($data, $options = 0)
+    public function __construct($data = null, $options = 0)
     {
         $this->data = $data;
         $this->options = $options;
     }
 
+    /**
+     * @param null $data
+     * @return JSONPath
+     */
+    public function setData($data): JSONPath
+    {
+        $this->data = $data;
+        return $this;
+    }
+
     /**
      * Evaluate an expression
      *