diff --git a/Account/Account.php b/Account/Account.php
index 35fa37898..2cba85883 100644
--- a/Account/Account.php
+++ b/Account/Account.php
@@ -605,7 +605,7 @@ class Account implements ArrayableInterface, \JsonSerializable
      */
     public function __toString() : string
     {
-        return \json_encode($this->toArray());
+        return (string) \json_encode($this->toArray());
     }
 
     /**