diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5150a0e5c..b710fa004 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,15 @@
 
 ### Added
 
+* `StacIO.json_dumps` and `StacIO.json_loads` methods for JSON
+  serialization/deserialization. These were "private" methods, but are now "public" and
+  documented ([#471](https://github.com/stac-utils/pystac/pull/471))
+
 ### Changed
 
+* `pystac.stac_io.DuplicateObjectKeyError` moved to `pystac.DuplicateObjectKeyError`
+  ([#471](https://github.com/stac-utils/pystac/pull/471))
+
 ### Fixed
 
 ### Removed