diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19a4493..261ea9f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.2.0]
+
+### Added
+- Added support for for stacks of PlottableHistograms.
+
 ## [2.1.0]
 
 ### Added