diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c26b9842..09a668fe0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Versioned according to [Semantic Versioning](http://semver.org/).
 Changed:
 
   * Refactoring of `ocrd_utils.__init__` into thematic submodules, #536
+  * validation of file groups downgraded to notice, allow PRE fileGrp/USE prefix, #541
 
 Fixed: