diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9e1f16..18dbdc3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.1.1] - 2023-04-03
+### Added
+- Added package-lock.json files to lambda functions. 
+
 ## [3.1.0] - 2023-02-28
 ### Added
 - AppRegistry integration