update changelog and pubspec
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f8a16a..9b7a559 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+#### 0.13.1+3
+
+ * Sorting an already sorted list will no longer yield new change notifications.
+
 #### 0.13.1+2
 
  * Update to analyzer '<0.27.0'
diff --git a/pubspec.yaml b/pubspec.yaml
index b9c5c84..29829e2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: observe
-version: 0.13.1+2
+version: 0.13.1+3
 author: Polymer.dart Authors <web-ui-dev@dartlang.org>
 description: >
   Observable properties and objects for use in template_binding.