diff --git a/CHANGELOG.md b/CHANGELOG.md
index cfa14fc..21510b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Edge (not released)
 
+## 0.4.0
+
 * Simplify callbacks logic: no more necessity to pass `controller` variable to lambda. Thanks @BrainNya for active promotion.
 
 ## 0.3.2
diff --git a/lib/rubykassa/version.rb b/lib/rubykassa/version.rb
index ddf7715..b3916f4 100644
--- a/lib/rubykassa/version.rb
+++ b/lib/rubykassa/version.rb
@@ -1,4 +1,4 @@
 # -*- encoding : utf-8 -*-
 module Rubykassa
-  VERSION = "0.3.2"
+  VERSION = "0.4.0"
 end
\ No newline at end of file