diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89d36bb..9d4a4db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,10 +7,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [v1.2.0] - Unreleased
+## [v1.2.0] - 2024-05-14
 
 ### Changed
-- Merged Reference Design template_v2.1.0
+- Merge changes from
+  [`golioth/reference-design-template@template_v2.1.0`](https://github.com/golioth/reference-design-template/tree/template_v2.1.0).
 
 ## [v1.1.0] - 2023-09-22
 
diff --git a/prj.conf b/prj.conf
index deab389..e1bfda7 100644
--- a/prj.conf
+++ b/prj.conf
@@ -65,4 +65,4 @@ CONFIG_NEWLIB_LIBC=y
 CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
 
 # Firmware version used in DFU process
-CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION="1.1.0"
+CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION="1.2.0"