diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6ecb03d..865b72f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Updated the default Python version from 3.12 to 3.13. ([#299](https://github.com/heroku/buildpacks-python/pull/299))
+- Updated Poetry from 1.8.4 to 1.8.5. ([#300](https://github.com/heroku/buildpacks-python/pull/300))
 
 ## [0.19.2] - 2024-12-04
 
diff --git a/requirements/poetry.txt b/requirements/poetry.txt
index 8e44691..b7c6742 100644
--- a/requirements/poetry.txt
+++ b/requirements/poetry.txt
@@ -1 +1 @@
-poetry==1.8.4
+poetry==1.8.5