diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28c3b65..c02eadf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,13 +5,20 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+## [0.4.1]
+
+### Changed
+- setables are now fully optional
+
 ### Fixed
 - Writing NDarrays to `instrument.json` files
+- min and max value updating was buggy---now these values are never cached
 
 ## [0.4.0]
 
 ### Added
 - initial release after a major rewrite
 
-[Unreleased]: https://github.com/wright-group/attune/compare/0.4.0...master
+[Unreleased]: https://github.com/wright-group/attune/compare/0.4.1...master
+[0.4.1]: https://github.com/wright-group/attune/compare/0.4.0...0.4.1
 [0.4.0]: https://github.com/wright-group/attune/releases/tag/0.4.0
diff --git a/attune/VERSION b/attune/VERSION
index 1d0ba9e..267577d 100644
--- a/attune/VERSION
+++ b/attune/VERSION
@@ -1 +1 @@
-0.4.0
+0.4.1