diff --git a/Changelog.md b/Changelog.md
index fe75c863..d96f6652 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,9 +1,11 @@
+## [15.2.1] - 2023-04-27
+
+#### Fixed
+ - [#2357](https://github.com/jomjol/AI-on-the-edge-device/pull/2357) Fix Alignment Mark issue
+
+
 ## [15.2.0] - 2023-04-23
 
-### Update Procedure
-
-Update Procedure see [online documentation](https://jomjol.github.io/AI-on-the-edge-device-docs/Installation/#update-ota-over-the-air)
-
 ### Changes
 
 For a full list of changes see [Full list of changes](https://github.com/jomjol/AI-on-the-edge-device/compare/v15.1.1...v15.2.0)
@@ -35,10 +37,6 @@ For a full list of changes see [Full list of changes](https://github.com/jomjol/
 
 ## [15.1.1] - 2023-03-23
 
-### Update Procedure
-
-Update Procedure see [online documentation](https://jomjol.github.io/AI-on-the-edge-device-docs/Installation/#update-ota-over-the-air)
-
 ### Changes
 
 For a full list of changes see [Full list of changes](https://github.com/jomjol/AI-on-the-edge-device/compare/v15.1.0...v15.1.1)
@@ -968,7 +966,8 @@ External Illumination
 -   Initial Version
 
 
-[15.2.0]: https://github.com/jomjol/AI-on-the-edge-device/compare/v15.1.1...v15.1.2
+[15.2.1]: https://github.com/jomjol/AI-on-the-edge-device/compare/v15.2.0...v15.2.1
+[15.2.0]: https://github.com/jomjol/AI-on-the-edge-device/compare/v15.1.1...v15.2.0
 [15.1.1]: https://github.com/jomjol/AI-on-the-edge-device/compare/v15.1.0...v15.1.1
 [15.1.0]: https://github.com/jomjol/AI-on-the-edge-device/compare/v15.0.3...v15.1.0
 [15.0.3]: https://github.com/jomjol/AI-on-the-edge-device/compare/v14.0.3...v15.0.3