diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1606c4d..3e824ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## [Table of Contents]
 - [Unreleased](#unreleased)
+- [1.2.1](#121---2022-10-01)
 - [1.2.0](#120---2022-09-28)
 - [1.1.0](#110---2022-08-12)
 - [1.0.0](#100---2022-07-26)
@@ -12,6 +13,13 @@
 ### Removed
 ### Fixed
 
+## [1.2.1] - 2022-10-01
+### Added
+### Changed
+### Removed
+### Fixed
+- Crash due to non defined this when adding a single listener to the stack.
+
 ## [1.2.0] - 2022-09-28
 ### Added
 - parentWindow.eventListener: added new property to 'this' within event listeners scope. It may be used to remove itself after executing it once for ex. Contains name of the callback (event) and listener id.
@@ -34,7 +42,8 @@
 ### Removed
 ### Fixed
 
-[Unreleased]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/v1.2.0...HEAD
+[Unreleased]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/v1.2.1...HEAD
+[1.2.1]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/v1.2.0...v1.2.1
 [1.2.0]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/v1.0.0...v1.1.0
 [1.0.0]: https://github.com/regorxxx/Callbacks-Framework-SMP/compare/997dd95...v1.0.0
\ No newline at end of file
diff --git a/VERSION b/VERSION
index 0408c30..24e56e0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v1.2.0
\ No newline at end of file
+v1.2.1
\ No newline at end of file