diff --git a/CHANGELOG b/CHANGELOG
index 9102677..a5101af 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+v2.2.1:
+  date: 2017-07-27
+  changes:
+    - Fix issue with `relativeTo` for clean-css v4.x.
 v2.2.0:
   date: 2017-05-10
   changes:
diff --git a/README.md b/README.md
index 08dee9c..ec68180 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# grunt-contrib-cssmin v2.2.0 [![Build Status: Linux](https://travis-ci.org/gruntjs/grunt-contrib-cssmin.svg?branch=master)](https://travis-ci.org/gruntjs/grunt-contrib-cssmin) [![Build Status: Windows](https://ci.appveyor.com/api/projects/status/ntgfqc3ppk533m84/branch/master?svg=true)](https://ci.appveyor.com/project/gruntjs/grunt-contrib-cssmin/branch/master)
+# grunt-contrib-cssmin v2.2.1 [![Build Status: Linux](https://travis-ci.org/gruntjs/grunt-contrib-cssmin.svg?branch=master)](https://travis-ci.org/gruntjs/grunt-contrib-cssmin) [![Build Status: Windows](https://ci.appveyor.com/api/projects/status/ntgfqc3ppk533m84/branch/master?svg=true)](https://ci.appveyor.com/project/gruntjs/grunt-contrib-cssmin/branch/master)
 
 > Minify CSS
 
@@ -86,6 +86,7 @@ cssmin: {
 
 ## Release History
 
+ * 2017-07-27   v2.2.1   Fix issue with `relativeTo` for clean-css v4.x.
  * 2017-05-10   v2.2.0   Update clean-css to v4.1.1.
  * 2017-04-17   v2.1.0   Set required Node.js version to >=4 since clean-css 4.x requires that.
  * 2017-02-02   v2.0.0   Update clean-css to v4.0.3.
@@ -120,4 +121,4 @@ cssmin: {
 
 Task submitted by [Tim Branyen](http://tbranyen.com/)
 
-*This file was generated on Wed May 10 2017 18:02:52.*
+*This file was generated on Thu Jul 27 2017 11:31:20.*
diff --git a/package.json b/package.json
index 2d9b084..b2eb5f6 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "grunt-contrib-cssmin",
   "description": "Minify CSS",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "author": {
     "name": "Grunt Team",
     "url": "http://gruntjs.com/"