diff --git a/CHANGELOG.md b/CHANGELOG.md
index a595a06..a80e3cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.4.0
++ Updated `broccoli-autoprefixer` dependency. It is now running
+  autoprefixer through PostCSS, which gets rid of the deprecation
+warnings.
+[#14](https://github.com/kimroen/ember-cli-autoprefixer/pull/14)
+
 ## 0.3.0
 + Added support for disabling autoprefixer. [#7](https://github.com/kimroen/ember-cli-autoprefixer/pull/7).
 + Updated version of `broccoli-autoprefixer`, which in turn updates Autoprefixer
diff --git a/README.md b/README.md
index 9f3bb2e..91f8f20 100644
--- a/README.md
+++ b/README.md
@@ -2,13 +2,11 @@
 This addon runs the styles of your EmberCLI-project through
 `autoprefixer`.
 
-*NB*: This addon requires Ember CLI version `0.0.39` or newer.
-
 ## Install
 To install, run
 
 ```
-npm install ember-cli-autoprefixer --save-dev
+ember install ember-cli-autoprefixer
 ```
 
 ## Options