diff --git a/CHANGELOG.md b/CHANGELOG.md
index e77275e..ea1c085 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### API Changes 😉
 
+#### Features works only on Unity Editor
+
+classes moved to `Editor` namespace.
+
 #### `USGEngine.ProcessFile()` will be removed
 
 use `USGUtility.ForceGenerateByType(typeof(...))` instead.