diff --git a/CHANGELOG.md b/CHANGELOG.md
index d168b98c6e488fd99ee4670c4495e07b62ab08d5..3f83bf13c941d3d1af7072e309b46f08dee0e32c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,8 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * The `linkahead` module now opts into type checking and supports mypy.
 
 ### Changed ###
+* `in` operator now test whether a parent with the appropriate ID, name or both is in `ParentList`
+* `in` operator now test whether a parent with the appropriate ID, name or both is in `PropertyList`
 
 ### Deprecated ###
+* `_ParentList` is now called `ParentList`
+* `_Properties` is now called `PropertyList`
 
 ### Removed ###