diff --git a/CHANGES.md b/CHANGES.md
index 81a08054a..c5506e04d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -14,6 +14,7 @@
 [#2250]: https://github.com/actix/actix-web/pull/2250
 [#2271]: https://github.com/actix/actix-web/pull/2271
 [#2263]: https://github.com/actix/actix-web/pull/2263
+[#2281]: https://github.com/actix/actix-web/pull/2281
 
 
 ## 4.0.0-beta.7 - 2021-06-17
diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index c8d65e393..59c9a6765 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -3,8 +3,10 @@
 ## Unreleased - 2021-xx-xx
 ### Changed
 * Change compression algorithm features flags. [#2250]
+* Add `#[must_use]` attribute for many public functions/methods. [#2281]
 
 [#2250]: https://github.com/actix/actix-web/pull/2250
+[#2281]: https://github.com/actix/actix-web/pull/2281
 
 
 ## 3.0.0-beta.7 - 2021-06-17