diff --git a/CHANGELOG.md b/CHANGELOG.md
index d9110fb..04c657c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,14 @@
 # Changelog
 All changes to the project will be documented in this file.
 
+## 4.21.1 - 01 Jan 2018
+
+- Release page
+- OpenID Connect support
+- New database viewer
+- Submodule links to web page
+- Clarify close/reopen button
+
 ## 4.20.0 - 23 Dec 2017
 
 - Squash and rebase merge strategy for pull requests
diff --git a/README.md b/README.md
index 53472b4..6483d29 100644
--- a/README.md
+++ b/README.md
@@ -71,15 +71,12 @@
 What's New in 4.20.x
 -------------
 
-### 4.20.0 - 23 Dec 2017
+### 4.21.1 - 01 Jan 2018
 
-- Squash and rebase merge strategy for pull requests
-- Quick pull request creation
-- Download patch from the diff view
-- Fork and create repository are proceeded asynchronously
-- Create new repository by copying existing git repository
-- Hide overflowed repository names in the sidebar
-- Support CreateEvent web hook
-- Display conflicting files if pull request can't be merged
+- Release page
+- OpenID Connect support
+- New database viewer
+- Submodule links to web page
+- Clarify close/reopen button
 
 See the [change log](CHANGELOG.md) for all of the updates.
diff --git a/build.sbt b/build.sbt
index 61e3d12..90c90db 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@
 
 val Organization = "io.github.gitbucket"
 val Name = "gitbucket"
-val GitBucketVersion = "4.20.0"
+val GitBucketVersion = "4.21.0"
 val ScalatraVersion = "2.6.1"
 val JettyVersion = "9.4.7.v20170914"