diff --git a/force_bdss/api.py b/force_bdss/api.py
index 7e35e66ba38ad6a858dd2304878f80602f677dbc..f31cff63b633ea8e61115ddb38e87b30d85d7936 100644
--- a/force_bdss/api.py
+++ b/force_bdss/api.py
@@ -19,6 +19,10 @@ from .data_sources.i_data_source_factory import IDataSourceFactory  # noqa
 from .factory_registry_plugin import IFactoryRegistryPlugin  # noqa
 from .factory_registry_plugin import FactoryRegistryPlugin  # noqa
 
+from .io.workflow_reader import WorkflowReader  # noqa
+from .io.workflow_reader import InvalidFileException
+from .io.workflow_writer import WorkflowWriter  # noqa
+
 from .mco.base_mco_model import BaseMCOModel  # noqa
 from .mco.base_mco_communicator import BaseMCOCommunicator  # noqa
 from .mco.base_mco import BaseMCO  # noqa