diff --git a/src/User/UserIdentityDetails.php b/src/User/UserIdentityDetails.php
index <HASH>..<HASH> 100644
--- a/src/User/UserIdentityDetails.php
+++ b/src/User/UserIdentityDetails.php
@@ -64,7 +64,7 @@ class UserIdentityDetails implements \JsonSerializable
     /**
      * @return array
      */
-    function jsonSerialize()
+    public function jsonSerialize()
     {
         return [
             'uuid' => $this->userId->toNative(),
III-<I> Fixed coding standards.