diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52ffcc1..82be286 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 0.23.0
+## 0.22.1
 
 * Added `ObservableList.castFrom`, similar to `List.castFrom`.
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 6a8f38b..97df0e0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: observable
-version: 0.23.0
+version: 0.22.1
 author: Dart Team <misc@dartlang.org>
 description: Support for marking objects as observable
 homepage: https://github.com/dart-lang/observable