Update the pubspec and changelog.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd5bc2c..330e026 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.9.1
+
+* Fix some documentation bugs.
+
 ## 1.9.0
 
 * Add a top-level `stronglyConnectedComponents()` function that returns the
diff --git a/pubspec.yaml b/pubspec.yaml
index f5c8f9f..eb9a3a2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: collection
-version: 1.9.0
+version: 1.9.1
 author: Dart Team <misc@dartlang.org>
 description: Collections and utilities functions and classes related to collections.
 homepage: https://www.github.com/dart-lang/collection