diff --git a/CHANGELOG.md b/CHANGELOG.md
index f17d0ef..faa162e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,11 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased:
 ## Bicleaner AI 3.1.0:
 ### Added:
 - `bicleaner-ai-sample` command to sample training data from multiple files/language pairs.
 
+### Changed:
+- Restrict `numpy` version to <2.
+ 
 ## Bicleaner AI 3.0.1:
 ### Changed:
  - Update hardrules to 2.10.4.