diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20e12f3ccd3..76f40bd1d1e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.3.15] - 2025-11-20
+
+### Fixed
+
+- Fix `tootctl upgrade storage-schema` failing with `ArgumentError` (#36914 by @shugo)
+- Fix old previously-undiscovered posts being treated as new when receiving an `Update` (#36848 by @ClearlyClaire)
+
 ## [4.3.14] - 2025-10-13
 
 ### Security
diff --git a/docker-compose.yml b/docker-compose.yml
index aa85aa066f9..cb691e53e11 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:v4.3.14
+    image: ghcr.io/mastodon/mastodon:v4.3.15
     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:v4.3.14
+    image: ghcr.io/mastodon/mastodon-streaming:v4.3.15
     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:v4.3.14
+    image: ghcr.io/mastodon/mastodon:v4.3.15
     restart: always
     env_file: .env.production
     command: bundle exec sidekiq
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index 33e5922b716..94de9035da5 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def patch
-      14
+      15
     end
 
     def default_prerelease