diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f1038cb..5b7371aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,13 @@ project adheres to [Semantic Versioning](http://semver.org).
 
 Nothing at the moment.
 
+## [4.0.0] - 2019-07-10
+
+### Removed
+
+- Installation through Bower is no longer supported.
+- The sass gem (the deprecated Ruby Sass) is no longer a runtime dependency.
+
 ## [3.0.1] - 2019-01-07
 
 ### Fixed
@@ -368,7 +375,8 @@ Nothing at the moment.
 
 - Initial release
 
-[unreleased]: https://github.com/thoughtbot/neat/compare/v3.0.1...HEAD
+[unreleased]: https://github.com/thoughtbot/neat/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/thoughtbot/neat/compare/v3.0.1...v4.0.0
 [3.0.1]: https://github.com/thoughtbot/neat/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/thoughtbot/neat/compare/v2.1.0...v3.0.0
 [2.1.0]: https://github.com/thoughtbot/neat/compare/v2.0.0...v2.1.0
diff --git a/core/_neat.scss b/core/_neat.scss
index 36050711..6a6a5ae4 100644
--- a/core/_neat.scss
+++ b/core/_neat.scss
@@ -1,5 +1,5 @@
 @charset "UTF-8";
-// Neat 3.0.1
+// Neat 4.0.0
 // http://neat.bourbon.io
 // Copyright 2012 thoughtbot, inc.
 // MIT License
diff --git a/lib/neat/version.rb b/lib/neat/version.rb
index e1398b1c..6e4f56b5 100644
--- a/lib/neat/version.rb
+++ b/lib/neat/version.rb
@@ -1,3 +1,3 @@
 module Neat
-  VERSION = "3.0.1"
+  VERSION = "4.0.0"
 end
diff --git a/package.json b/package.json
index 2598d49b..4ae2fb59 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bourbon-neat",
-  "version": "3.0.1",
+  "version": "4.0.0",
   "description": "A lightweight, semantic grid framework",
   "keywords": [
     "columns",