diff --git a/.travis.yml b/.travis.yml
index 332ca59d..2af9daf9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
   - 7.1
@@ -18,8 +17,6 @@ env:
 
 matrix:
   exclude:
-    - php: 5.5
-      env: DRUPAL_VERSION=8
     - php: 5.6
       env: DRUPAL_VERSION=6
     - php: 5.6
@@ -34,6 +31,9 @@ matrix:
 # Enable Travis containers.
 sudo: false
 
+services:
+  - mysql
+
 install:
   - composer self-update
   # For Drupal 8 install the behat drush endpoint.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 526a0fc4..8ba786b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+## [4.0.0] 2019-09-27
 ## [4.0.0 rc1] 2019-07-24
 ### Changed
   * [#528](https://github.com/jhedstrom/drupalextension/pull/528) Show a more helpful failure when running `@javascript`
@@ -107,7 +108,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   * [#437](https://github.com/jhedstrom/drupalextension/pull/437): Radio button selector fix.
   * [#439](https://github.com/jhedstrom/drupalextension/pull/439): Symfony 3 compatibility follow-up fix.
 
-[Unreleased]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0rc1...HEAD
+[Unreleased]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0rc1...v4.0.0
 [4.0.0 rc1]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0beta2...v4.0.0rc1
 [4.0.0 beta2]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0beta1...v4.0.0beta2
 [4.0.0 beta1]: https://github.com/jhedstrom/drupalextension/compare/v4.0.0alpha4...v4.0.0beta1