diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9a499b..00b2d6e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.2.1] - 2023-12-20
+
+### Changed
+- IN-CORE release for 4.8.1 with pyincore 1.15.1 [#96](https://github.com/IN-CORE/incore-lab/issues/96)
+
 ## [1.2.0] - 2023-12-13 
 
 ### Added
diff --git a/config.yml b/config.yml
index 6761faf..e8a8de2 100644
--- a/config.yml
+++ b/config.yml
@@ -3,7 +3,7 @@ project: "IN-CORE Lab"
 author: "Yong Wook Kim"
 Channel: "in-core"
 # version form must be "x.x.x"
-INCORE_VERSION: "4.8.0"
-PyIncore: "1.15.0"
+INCORE_VERSION: "4.8.1"
+PyIncore: "1.15.1"
 PyIncore-Viz: "1.9.0"
 PyIncore-Data: "0.6.1"