diff --git a/CHANGES.md b/CHANGES.md
index 5936e777e..66de9c915 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,8 +2,7 @@
 
 ## Internal Changes
 
-- Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin. ([\#18962](https://github.com/element-hq/synapse/issues/18962))
-
+- Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin. This change was applied on top of 1.139.0rc1. ([\#18962](https://github.com/element-hq/synapse/issues/18962))
 
 
 
@@ -74,6 +73,23 @@
 * Bump types-requests from 2.32.4.20250611 to 2.32.4.20250809. ([\#18895](https://github.com/element-hq/synapse/issues/18895))
 * Bump types-setuptools from 80.9.0.20250809 to 80.9.0.20250822. ([\#18924](https://github.com/element-hq/synapse/issues/18924))
 
+# Synapse 1.138.2 (2025-09-24)
+
+## Internal Changes
+
+- Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin. This change was applied on top of 1.138.1. ([\#18962](https://github.com/element-hq/synapse/issues/18962))
+
+
+
+# Synapse 1.138.1 (2025-09-24)
+
+## Bugfixes
+
+- Fix a performance regression related to the experimental Delayed Events ([MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140)) feature. ([\#18926](https://github.com/element-hq/synapse/issues/18926))
+
+
+
+
 # Synapse 1.138.0 (2025-09-09)
 
 No significant changes since 1.138.0rc1.
diff --git a/debian/changelog b/debian/changelog
index c37847355..36fffe4d5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -10,6 +10,18 @@ matrix-synapse-py3 (1.139.0~rc1) stable; urgency=medium
 
  -- Synapse Packaging team <packages@matrix.org>  Tue, 23 Sep 2025 13:24:50 +0100
 
+matrix-synapse-py3 (1.138.2) stable; urgency=medium
+
+  * New Synapse release 1.138.2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 24 Sep 2025 12:26:16 +0100
+
+matrix-synapse-py3 (1.138.1) stable; urgency=medium
+
+  * New Synapse release 1.138.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 24 Sep 2025 11:32:38 +0100
+
 matrix-synapse-py3 (1.138.0) stable; urgency=medium
 
   * New Synapse release 1.138.0.
diff --git a/docs/upgrade.md b/docs/upgrade.md
index d4f37227d..5f998e970 100644
--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@@ -119,12 +119,6 @@ stacking them up. You can monitor the currently running background updates with
 
 # Upgrading to v1.139.0
 
-## Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin
-
-Ubuntu 24.10 Oracular Oriole [has been end-of-life since 10 Jul
-2025](https://endoflife.date/ubuntu). This release drops support for Ubuntu
-24.10, and in its place adds support for Ubuntu 25.04 Plucky Puffin.
-
 ## `/register` requests from old application service implementations may break when using MAS
 
 Application Services that do not set `inhibit_login=true` when calling `POST
@@ -140,6 +134,16 @@ ensure it is up to date. If it is, then kindly let the author know that they
 need to update their implementation to call `/register` with
 `inhibit_login=true`.
 
+# Upgrading to v1.138.2
+
+## Drop support for Ubuntu 24.10 Oracular Oriole, and add support for Ubuntu 25.04 Plucky Puffin
+
+Ubuntu 24.10 Oracular Oriole [has been end-of-life since 10 Jul
+2025](https://endoflife.date/ubuntu). This release drops support for Ubuntu
+24.10, and in its place adds support for Ubuntu 25.04 Plucky Puffin.
+
+This notice also applies to the v1.139.0 release.
+
 # Upgrading to v1.136.0
 
 ## Deprecate `run_as_background_process` exported as part of the module API interface in favor of `ModuleApi.run_as_background_process`
diff --git a/pyproject.toml b/pyproject.toml
index 846bf78e0..c548a652e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.139.0rc2"
+version = "1.138.2"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later"