diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12f7e8fab..37df345ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Security
+- Mastodon API: Fix being able to request enourmous amount of statuses in timelines leading to DoS. Now limited to 40 per request.
+
 ### Removed
 - **Breaking**: Removed 1.0+ deprecated configurations `Pleroma.Upload, :strip_exif` and `:instance, :dedupe_media`
 - **Breaking**: OStatus protocol support
@@ -56,6 +59,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Admin API: Render whole status in grouped reports
 - Mastodon API: User timelines will now respect blocks, unless you are getting the user timeline of somebody you blocked (which would be empty otherwise).
 - Mastodon API: Favoriting / Repeating a post multiple times will now return the identical response every time. Before, executing that action twice would return an error ("already favorited") on the second try.
+- Mastodon API: Limit timeline requests to 3 per timeline per 500ms per user/ip by default.
 </details>
 
 ### Added