diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6941fe6..cd91741 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ HyBIG follows semantic versioning. All notable changes to this project will be
 documented in this file. The format is based on [Keep a
 Changelog](http://keepachangelog.com/en/1.0.0/).
 
-## [unreleased] - 2024-06-06
+## [v1.2.1] - 2024-06-10
 
 ### Changed
 Updated internal library dependencies.
@@ -47,7 +47,8 @@ outlined by the NASA open-source guidelines.
 For more information on internal releases prior to NASA open-source approval,
 see legacy-CHANGELOG.md.
 
-[unreleased]:https://github.com/nasa/harmony-browse-image-generator/compare/1.2.0..HEAD
+[unreleased]:https://github.com/nasa/harmony-browse-image-generator/compare/1.2.1..HEAD
+[v1.2.1]: https://github.com/nasa/harmony-browse-image-generator/compare/1.2.0..1.2.1
 [v1.2.0]: https://github.com/nasa/harmony-browse-image-generator/compare/1.1.0..1.2.0
 [v1.1.0]: https://github.com/nasa/harmony-browse-image-generator/compare/1.0.2..1.1.0
 [v1.0.2]: https://github.com/nasa/harmony-browse-image-generator/compare/1.0.1..1.0.2
diff --git a/docker/service_version.txt b/docker/service_version.txt
index 26aaba0..6085e94 100644
--- a/docker/service_version.txt
+++ b/docker/service_version.txt
@@ -1 +1 @@
-1.2.0
+1.2.1