diff --git a/CHANGELOG b/CHANGELOG
index 548faf4..4856110 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -622,3 +622,17 @@
 * Fix incorrect redirect in response to unauthenticated API requests in limited federation mode ([#34549](https://github.com/tootsuite/mastodon/issues/34549) by [@ClearlyClaire](https://github.com/ClearlyClaire))
 * Fix sign-up e-mail confirmation page reloading on error or redirect ([#34548](https://github.com/tootsuite/mastodon/issues/34548) by [@ClearlyClaire](https://github.com/ClearlyClaire))
 
+[1.15.4]
+* Update mastodon to 4.3.9
+* [Full Changelog](https://github.com/mastodon/mastodon/releases/tag/v4.3.9)
+* Change passthrough video processing to emit `moov` atom at start of video ([#​34726](https://github.com/tootsuite/mastodon/issues/34726) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix `NoMethodError` in edge case of emoji cache handling ([#​34749](https://github.com/tootsuite/mastodon/issues/34749) by [@​dariusk](https://github.com/dariusk))
+* Fix error when viewing statuses to deleted replies in moderation view ([#​32986](https://github.com/tootsuite/mastodon/issues/32986) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix search operators sometimes getting lost ([#​35190](https://github.com/tootsuite/mastodon/issues/35190) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix Alt text button submitting form in moderation interface ([#​35147](https://github.com/tootsuite/mastodon/issues/35147) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix handling of remote attachments with multiple media types ([#​34996](https://github.com/tootsuite/mastodon/issues/34996) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix blocked accounts not being automatically removed from trending statuses ([#​34891](https://github.com/tootsuite/mastodon/issues/34891) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix inconsistent filtering of silenced accounts for other silenced accounts ([#​34863](https://github.com/tootsuite/mastodon/issues/34863) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix handling of inlined `featured` collections in ActivityPub actor objects ([#​34789](https://github.com/tootsuite/mastodon/issues/34789) and [#​34811](https://github.com/tootsuite/mastodon/issues/34811) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+* Fix admin dashboard crash on specific Elasticsearch connection errors ([#​34683](https://github.com/tootsuite/mastodon/issues/34683) by [@​ClearlyClaire](https://github.com/ClearlyClaire))
+
diff --git a/CloudronManifest.json b/CloudronManifest.json
index bad89f2..9d014e7 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -5,7 +5,7 @@
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG",
   "tagline": "Federated social network",
-  "version": "1.15.3",
+  "version": "1.15.4",
   "upstreamVersion": "4.3.9",
   "healthCheckPath": "/about",
   "httpPort": 8000,