diff --git a/src/rougail/output_json/__init__.py b/src/rougail/output_json/__init__.py
index e6f6677..672ac10 100644
--- a/src/rougail/output_json/__init__.py
+++ b/src/rougail/output_json/__init__.py
@@ -37,6 +37,7 @@ class RougailOutputJson:
         rougailconfig: "RougailConfig" = None,
         user_data_errors: Optional[list] = None,
         user_data_warnings: Optional[list] = None,
+        **kwargs,
     ) -> None:
         if rougailconfig is None:
             from rougail import RougailConfig