diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59ca607..5ab3531 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins
 
 
 ## [Unreleased]
+
+## [4.0.0] - 2019-04-18
 ### Breaking Changes
 - Update minimum required ruby version to 2.3. Drop unsupported ruby versions.
 - Bump `sensu-plugin` dependency from `~> 1.2` to `~> 4.0` you can read the changelog entries for [4.0](https://github.com/sensu-plugins/sensu-plugin/blob/master/CHANGELOG.md#400---2018-02-17), [3.0](https://github.com/sensu-plugins/sensu-plugin/blob/master/CHANGELOG.md#300---2018-12-04), and [2.0](https://github.com/sensu-plugins/sensu-plugin/blob/master/CHANGELOG.md#v200---2017-03-29)
@@ -198,7 +200,8 @@ This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins
 - built against 1.9.3, 2.0, 2.1
 - cryptographically signed
 
-[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.2.0...HEAD
+[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.0.0...HEAD
+[4.0.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.2.0...4.0.0
 [3.2.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.1.0...3.2.0
 [3.1.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.0.2...3.1.0
 [3.0.2]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.0.1...3.0.2
diff --git a/lib/sensu-plugins-process-checks/version.rb b/lib/sensu-plugins-process-checks/version.rb
index 1773815..73ff3e1 100644
--- a/lib/sensu-plugins-process-checks/version.rb
+++ b/lib/sensu-plugins-process-checks/version.rb
@@ -1,7 +1,7 @@
 module SensuPluginsProcessChecks
   module Version
-    MAJOR = 3
-    MINOR = 2
+    MAJOR = 4
+    MINOR = 0
     PATCH = 0
 
     VER_STRING = [MAJOR, MINOR, PATCH].compact.join('.')