diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70b466134..bf02f98e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+- ENH: Flight simulation speed up [#581] (https://github.com/RocketPy-Team/RocketPy/pull/581)
 - DOC: Improvements of Environment docstring phrasing [#565](https://github.com/RocketPy-Team/RocketPy/pull/565)
 - MNT: Refactor flight prints module [#579](https://github.com/RocketPy-Team/RocketPy/pull/579)
 - DOC: Convert CompareFlights example notebooks to .rst files [#576](https://github.com/RocketPy-Team/RocketPy/pull/576)