diff --git a/.changes/v2.9.0.md b/.changes/v2.9.0.md
index 08b9606c3..2dbf55619 100644
--- a/.changes/v2.9.0.md
+++ b/.changes/v2.9.0.md
@@ -12,3 +12,12 @@
 - modification des motifs de cloture des parcours: ajout d'un chanmp "annule le parcours", qui permet d'indiquer que le motif "annule" le parcours. Les parcours annulés n'apparaissent
   pas dans les statistiques
 - ajouter d'un regroupement pour les échanges: grouper par métier et service du créateur de l'échange
+
+
+### Possible BC break in configuration
+
+This release remove the use of deprecated package [symfony/templating](https://symfony.com/components/Templating).
+
+If you use this package in your own bundle (usually `src/` directory, or other dependencies), you should add this dependencies in your local composer.json (`composer require symfony/templating`).
+
+But if you do not need this any more, you must ensure that the configuration key `framework.templating` is removed. This is usually located into `config/packages/framework.yaml`. [See here an example](https://gitea.champs-libres.be/Chill-project/chill-skeleton-basic/commit/cc716beaecc239e6a189f3db62ea95f169a37505#diff-df607fe73ff82c569824a7392edf5e760e998efe)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18aabec77..7ade82289 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,15 @@ and is generated by [Changie](https://github.com/miniscruff/changie).
   pas dans les statistiques
 - ajouter d'un regroupement pour les échanges: grouper par métier et service du créateur de l'échange
 
+
+### Possible BC break in configuration
+
+This release remove the use of deprecated package [symfony/templating](https://symfony.com/components/Templating).
+
+If you use this package in your own bundle (usually `src/` directory, or other dependencies), you should add this dependencies in your local composer.json (`composer require symfony/templating`).
+
+But if you do not need this any more, you must ensure that the configuration key `framework.templating` is removed. This is usually located into `config/packages/framework.yaml`. [See here an example](https://gitea.champs-libres.be/Chill-project/chill-skeleton-basic/commit/cc716beaecc239e6a189f3db62ea95f169a37505#diff-df607fe73ff82c569824a7392edf5e760e998efe)
+
 ## v2.8.0 - 2023-10-05
 
 ### Feature