diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f597bc797..887c04a531 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,8 @@ release.
   ([#484](https://github.com/open-telemetry/semantic-conventions/pull/484))
 - Depluralize labels for pod (`k8s.pod.labels.*`) and container (`container.labels.*`) resources
   ([#625](https://github.com/open-telemetry/semantic-conventions/pull/625))
+- Make `network.protocol.name` conditionally required for messaging
+  ([#644](https://github.com/open-telemetry/semantic-conventions/pull/644))
 
 ### Features