diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1044091..7e11a7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Updated libcnb to 0.27.0, which includes opentelemetry 0.28 and the new custom OTLP File Exporter. ([#262](https://github.com/heroku/buildpacks-procfile/pull/262))
+
 ## [4.0.0] - 2025-01-21
 
 ### Changed