diff --git a/siuba/__init__.py b/siuba/__init__.py
index 1488cab5..f465e74e 100644
--- a/siuba/__init__.py
+++ b/siuba/__init__.py
@@ -1,5 +1,5 @@
 # version ---------------------------------------------------------------------
-__version__ = "0.4.0"
+__version__ = "0.4.1"
 
 # default imports--------------------------------------------------------------
 from .siu import _, Fx, Lam