diff --git a/.travis.yml b/.travis.yml
index 00c75ff..d8ab0e9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,6 @@ services:
   - mongodb
 
 rvm:
-  - 2.3.8
   - 2.4.9
   - 2.5.7
   - 2.6.5
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1cc8933..5654747 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Draper Changelog
 
+## 4.0.0 - 2020-02-05
+
+### Breaking Changes
+* Drop support for Ruby < 2.4 [#852](https://github.com/drapergem/draper/pull/852), [#872](https://github.com/drapergem/draper/pull/872)
+* Don't delegate public methods overridden by a private method in the decorator [#849](https://github.com/drapergem/draper/pull/849)
+
+### Fixes
+* Add preservation of decorator options on QueryMethods [#868](https://github.com/drapergem/draper/pull/868)
+* Add `#respond_to_missing?` to `CollectionDecorator` so it correctly responds to ORM methods [#850](https://github.com/drapergem/draper/pull/850)
+* Fix deprecation warning with the new Rails 6 `ActionView::Base` constructor [#866](https://github.com/drapergem/draper/pull/866)
+* Fix deprecation warning with Ruby 2.7 [#870](https://github.com/drapergem/draper/pull/870)
+
+### Other Changes
+* Add SimpleCov for code coverage analysis [#851](https://github.com/drapergem/draper/pull/851)
+* Update RSpec syntax in the README [#855](https://github.com/drapergem/draper/pull/855)
+* Update continuous integration configuration [#861](https://github.com/drapergem/draper/pull/861), [#862](https://github.com/drapergem/draper/pull/862), [#863](https://github.com/drapergem/draper/pull/863), [#872](https://github.com/drapergem/draper/pull/872)
+
 ## 3.1.0
 * Rails 6 support [#841](https://github.com/drapergem/draper/pull/841)
 * Include ORM query methods in `CollectionDecorator` (e.g. `includes`) [#845](https://github.com/drapergem/draper/pull/845)
diff --git a/README.md b/README.md
index f687c71..a7b65fb 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,7 @@ Decorators are the ideal place to:
 
 ## Installation
 
-As of version 3.0.0, Draper is only compatible with Rails 5 / Ruby 2.2 and later. Add Draper to your Gemfile.
+As of version 4.0.0, Draper only officially supports Rails 5.2 / Ruby 2.4 and later. Add Draper to your Gemfile.
 
 ```ruby
   gem 'draper'
diff --git a/lib/draper/version.rb b/lib/draper/version.rb
index 03b9f5f..284743b 100644
--- a/lib/draper/version.rb
+++ b/lib/draper/version.rb
@@ -1,3 +1,3 @@
 module Draper
-  VERSION = '3.1.0'
+  VERSION = '4.0.0'
 end