diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0d717c3..7acc3c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v0.4.0]
+
+- Update event handling for new `constexpr` templated arguments
+
 # [v0.3.4]
 
 - Hotfixes for pyproject.toml file