diff --git a/cumulus_library/__init__.py b/cumulus_library/__init__.py
index d2d59ec..9ba5463 100644
--- a/cumulus_library/__init__.py
+++ b/cumulus_library/__init__.py
@@ -6,4 +6,4 @@
 from cumulus_library.study_manifest import StudyManifest
 
 __all__ = ["BaseTableBuilder", "CountsBuilder", "StudyConfig", "StudyManifest"]
-__version__ = "4.0.0"
+__version__ = "4.1.0"