diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ffe675517f..3e3b6dc567e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@
 
 * `dart:developer`
   * Added `Timeline` class for interacting with Observatory's timeline feature.
+  * Added `ServiceExtensionHandler`, `ServiceExtensionResponse`, and `registerExtension` which enable developers to provide their own VM service protocol extensions.
   
 * `dart:io`
   * **Breaking:** Secure networking has changed, replacing the NSS library