diff --git a/CHANGELOG.md b/CHANGELOG.md
index d124cfd..c3982f7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Updated Poetry from 2.3.3 to 2.3.4. ([#553](https://github.com/heroku/buildpacks-python/pull/553))
 - Updated uv from 0.11.3 to 0.11.6. ([#552](https://github.com/heroku/buildpacks-python/pull/552))
 
 ## [6.4.0] - 2026-04-09
diff --git a/requirements/poetry.txt b/requirements/poetry.txt
index 32a2135..eb883fe 100644
--- a/requirements/poetry.txt
+++ b/requirements/poetry.txt
@@ -1 +1 @@
-poetry==2.3.3
+poetry==2.3.4