diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fd8386..8cb00ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [1.1] - 2018-12-21
+### Added
+- Throw DocumentNotFoundError when update fail.
+
 ## [1.0.0] - 2018-07-19
 ### Added
 - Initial commit