diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a5cbae0..96d1e030 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-* Removed `Transport` and the `hyper` and `reqwest` features. `ReqwestTransport` is now the default and `HyperTransport` has been removed. Existing `ReqwestTransport` functions have been moved to `AgentBuilder`.
+* Breaking: Removed `Transport` and the `hyper` and `reqwest` features. `ReqwestTransport` is now the default and `HyperTransport` has been removed. Existing `ReqwestTransport` functions have been moved to `AgentBuilder`.
 * `Url` now implements `RouteProvider`.
 * Add canister snapshot methods to `ManagementCanister`.