diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76f40bd1d1..bbf142bf7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,18 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.3.16] - 2025-12-08
+
+### Security
+
+- Fix inconsistent error handling leaking information on existence of private posts ([GHSA-gwhw-gcjx-72v8](https://github.com/mastodon/mastodon/security/advisories/GHSA-gwhw-gcjx-72v8))
+
+### Fixed
+
+- Fix YouTube embeds by sending referer (#37126 by @ChaosExAnima)
+- Fix YouTube iframe not being able to start at a defined time (#26584 by @BrunoViveiros)
+- Fix known expensive S3 batch delete operation failing because of short timeouts (#37004 by @ClearlyClaire)
+
 ## [4.3.15] - 2025-11-20
 
 ### Fixed
diff --git a/docker-compose.yml b/docker-compose.yml
index ebabd12cc7..e379a15430 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -59,7 +59,7 @@ services:
   web:
     # You can uncomment the following line if you want to not use the prebuilt image, for example if you have local code changes
     # build: .
-    image: ghcr.io/mastodon/mastodon:v4.3.15
+    image: ghcr.io/mastodon/mastodon:v4.3.16
     restart: always
     env_file: .env.production
     command: bundle exec puma -C config/puma.rb
@@ -83,7 +83,7 @@ services:
     # build:
     #   dockerfile: ./streaming/Dockerfile
     #   context: .
-    image: ghcr.io/mastodon/mastodon-streaming:v4.3.15
+    image: ghcr.io/mastodon/mastodon-streaming:v4.3.16
     restart: always
     env_file: .env.production
     command: node ./streaming/index.js
@@ -102,7 +102,7 @@ services:
   sidekiq:
     # You can uncomment the following line if you want to not use the prebuilt image, for example if you have local code changes
     # build: .
-    image: ghcr.io/mastodon/mastodon:v4.3.15
+    image: ghcr.io/mastodon/mastodon:v4.3.16
     restart: always
     env_file: .env.production
     command: bundle exec sidekiq
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index 94de9035da..7b898ce5b6 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      15
+      16
     end
 
     def default_prerelease