diff --git a/python_helpers/_version.py b/python_helpers/_version.py
index 5e2cc08..42045ca 100644
--- a/python_helpers/_version.py
+++ b/python_helpers/_version.py
@@ -7,5 +7,5 @@
 
 from incremental import Version
 
-__version__ = Version("python_helpers", 4, 2, 7)
+__version__ = Version("python_helpers", 4, 2, 8)
 __all__ = ["__version__"]
diff --git a/python_helpers/ph_keys.py b/python_helpers/ph_keys.py
index c1d8071..394c377 100644
--- a/python_helpers/ph_keys.py
+++ b/python_helpers/ph_keys.py
@@ -167,6 +167,7 @@ class PhKeys:
     DATA_GROUP = 'data_group'
     REMARKS = 'remarks'
     REMARKS_GENERATED = 'remarks_generated'
+    DEFAULT = 'default'
 
     INPUT = 'input'
     INPUT_DATA = 'input_data'