diff --git a/CHANGELOG.md b/CHANGELOG.md
index 014e2bf..3c8289d 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 
 ## [Unreleased]
 
+## [2.2.1] - 2017-11-04
 ### Fixed
 - check-marathon-task.rb: solved a bug which prevented to alert when number of instances were retrieved from Marathon
 
@@ -82,6 +83,7 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 - initial release
 
 [Unreleased]: https://github.com/sensu-plugins/sensu-plugins-mesos/compare/2.1.0...HEAD
+[2.1.1]: https://github.com/sensu-plugins/sensu-plugins-mesos/compare/2.1.0...2.1.1
 [2.1.0]: https://github.com/sensu-plugins/sensu-plugins-mesos/compare/2.0.0...2.1.0
 [2.0.0]: https://github.com/sensu-plugins/sensu-plugins-mesos/compare/1.1.0...2.0.0
 [1.1.0]: https://github.com/sensu-plugins/sensu-plugins-mesos/compare/1.0.0...1.1.0
diff --git a/lib/sensu-plugins-mesos/version.rb b/lib/sensu-plugins-mesos/version.rb
index 7c56acf..250ebb3 100755
--- a/lib/sensu-plugins-mesos/version.rb
+++ b/lib/sensu-plugins-mesos/version.rb
@@ -2,7 +2,7 @@ module SensuPluginsMesos
   module Version
     MAJOR = 2
     MINOR = 1
-    PATCH = 0
+    PATCH = 1
 
     VER_STRING = [MAJOR, MINOR, PATCH].compact.join('.')
   end