diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5e5b419b6..641a12c819 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com)
 and this project adheres to [Semantic Versioning](https://semver.org).
 
-## TBD - 3.9.0
+## TBD - 4.0.0
 
 ### Added
 
-- Methods to get style for row or column. [PR #4317](https://github.com/PHPOffice/PhpSpreadsheet/pull/4317)
-- Method for duplicating worksheet in spreadsheet. [PR #4315](https://github.com/PHPOffice/PhpSpreadsheet/pull/4315)
+- Nothing yet.
 
 ### Changed
 
@@ -26,6 +25,18 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Fixed
 
+- Nothing yet.
+
+## 2025-01-26 - 3.9.0
+
+### Added
+
+- Methods to get style for row or column. [PR #4317](https://github.com/PHPOffice/PhpSpreadsheet/pull/4317)
+- Method for duplicating worksheet in spreadsheet. [PR #4315](https://github.com/PHPOffice/PhpSpreadsheet/pull/4315)
+
+### Fixed
+
+- Security patch for control characters in protocol.
 - Ods Reader Sheet Names with Period. [Issue #4311](https://github.com/PHPOffice/PhpSpreadsheet/issues/4311) [PR #4313](https://github.com/PHPOffice/PhpSpreadsheet/pull/4313)
 - Mpdf and Tcpdf Hidden Columns and Merged Cells. [Issue #4319](https://github.com/PHPOffice/PhpSpreadsheet/issues/4319) [PR #4320](https://github.com/PHPOffice/PhpSpreadsheet/pull/4320)
 - Html Writer Allow mailto. [Issue #4316](https://github.com/PHPOffice/PhpSpreadsheet/issues/4316) [PR #4322](https://github.com/PHPOffice/PhpSpreadsheet/pull/4322)