bump version for release

bump version for release

diff --git a/CHANGELOG b/CHANGELOG
index f39bc61..0e0c204 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,6 @@
-Unreleased
+30-04-2019
+
+- Version 2.2.1
 
   - FIX: No longer handles exceptions raised in downstream middleware via `on_middleware_error`
 
diff --git a/lib/message_bus/version.rb b/lib/message_bus/version.rb
index acd4852..a43aac7 100644
--- a/lib/message_bus/version.rb
+++ b/lib/message_bus/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module MessageBus
-  VERSION = "2.2.0"
+  VERSION = "2.2.1"
 end

GitHub sha: 90fba639