diff --git a/CHANGELOG.md b/CHANGELOG.md
index d504cd62b96e97b52db5ff88003efe9e57e23c01..c3d7d04e0e9ebdc3df2cb9b83c5bb1a9c7c28c49 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - The `CharField`s and `TextFields` in the models are not nullable.
 - The `subtitle` field of th `Category` model is now a `CharField`.
 - Provide properties in API schemas in CamelCase notation (aura#141)
+- Use _id suffix for all object reference in REST APIs (aura#166)
 
 ### Deprecated