diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f8af4e..c0c9419 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins
 
 
 ## [Unreleased]
+
+## [4.2.1] - 2020-09-26
+### Fixed
+- .bonsai.yml: fixed wrong(not matching) entity.system.platform filter. (@itachi17)
+
 ## [4.2.0] - 2020-04-08
 ### Changed
 - Updated english gem runtime dependency from 0.6.3 to 0.7.0 (0.6.3 was yanked).
@@ -13,9 +18,6 @@ This CHANGELOG follows the format listed [here](https://github.com/sensu-plugins
 ### Added
 - Updated asset build targets to support centos6
 
-## [4.0.2] - 2019-11-11
-### Fixed
-- .bonsai.yml: fixed wrong(not matching) entity.system.platform filter. (@itachi17)
 
 ## [4.0.1] - 2019-05-06
 ### Fixed
@@ -215,7 +217,9 @@ 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/4.1.0...HEAD
+[Unreleased]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.2.1...HEAD
+[4.2.1]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.2.0...4.2.1
+[4.2.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.1.0...4.2.0
 [4.1.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.0.1...4.1.0
 [4.0.1]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/4.0.0...4.0.1
 [4.0.0]: https://github.com/sensu-plugins/sensu-plugins-process-checks/compare/3.2.0...4.0.0
diff --git a/lib/sensu-plugins-process-checks/version.rb b/lib/sensu-plugins-process-checks/version.rb
index e6f4286..c901604 100644
--- a/lib/sensu-plugins-process-checks/version.rb
+++ b/lib/sensu-plugins-process-checks/version.rb
@@ -2,7 +2,7 @@ module SensuPluginsProcessChecks
   module Version
     MAJOR = 4
     MINOR = 2
-    PATCH = 0
+    PATCH = 1
 
     VER_STRING = [MAJOR, MINOR, PATCH].compact.join('.')
   end