diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f6384f..ac1e475 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.4.0
+
+- Addg `Subject.isObserved` (thanks to [tsouza](https://github.com/tsouza)).
+- Add "inclusive" option to `Observable.takeWhile` (thanks to [tsouza](https://github.com/tsouza)).
+
 ## 0.3.0
 
 - Dart 3.0 requirement.
diff --git a/pubspec.yaml b/pubspec.yaml
index 6024a56..449758c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: rx
-version: 0.3.0
+version: 0.4.0
 
 homepage: https://github.com/renggli/dart-rx
 description: Reactive Extensions Library for Dart providing an API for asynchronous programming