diff --git a/CHANGES.md b/CHANGES.md
index e1680d134..e286dc154 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,18 @@
+# Synapse 1.139.0 (2025-09-30)
+
+### `/register` requests from old application service implementations may break when using MAS
+
+If you are using Matrix Authentication Service (MAS), as of this release any
+Application Services that do not set `inhibit_login=true` when calling `POST
+/_matrix/client/v3/register` will receive the error
+`IO.ELEMENT.MSC4190.M_APPSERVICE_LOGIN_UNSUPPORTED` in response. Please see [the
+upgrade
+notes](https://element-hq.github.io/synapse/develop/upgrade.html#register-requests-from-old-application-service-implementations-may-break-when-using-mas)
+for more information.
+
+No significant changes since 1.139.0rc3.
+
+
 # Synapse 1.139.0rc3 (2025-09-25)
 
 ## Bugfixes
diff --git a/debian/changelog b/debian/changelog
index 6c476674f..c4450e0f5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,16 @@
-matrix-synapse-py3 (1.139.0~rc3+nmu1) UNRELEASED; urgency=medium
+matrix-synapse-py3 (1.139.0) stable; urgency=medium
+
+  * New Synapse release 1.139.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 30 Sep 2025 11:58:55 +0100
+
+matrix-synapse-py3 (1.139.0~rc3) stable; urgency=medium
+
+  * New Synapse release 1.139.0rc3.
+
+ -- Synapse Packaging team <packages@matrix.org>  Thu, 25 Sep 2025 12:13:23 +0100
+
+matrix-synapse-py3 (1.138.2) stable; urgency=medium
 
   * The licensing specifier has been updated to add an optional
     `LicenseRef-Element-Commercial` license. The code was already licensed in
@@ -6,11 +18,11 @@ matrix-synapse-py3 (1.139.0~rc3+nmu1) UNRELEASED; urgency=medium
 
  -- Synapse Packaging team <packages@matrix.org>  Thu, 25 Sep 2025 12:17:17 +0100
 
-matrix-synapse-py3 (1.139.0~rc3) stable; urgency=medium
+matrix-synapse-py3 (1.138.1) stable; urgency=medium
 
-  * New Synapse release 1.139.0rc3.
+  * New Synapse release 1.138.1.
 
- -- Synapse Packaging team <packages@matrix.org>  Thu, 25 Sep 2025 12:13:23 +0100
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 24 Sep 2025 11:32:38 +0100
 
 matrix-synapse-py3 (1.139.0~rc2) stable; urgency=medium
 
@@ -24,24 +36,6 @@ 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.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 09 Sep 2025 11:21:25 +0100
-
 matrix-synapse-py3 (1.138.0~rc1) stable; urgency=medium
 
   * New synapse release 1.138.0rc1.
diff --git a/pyproject.toml b/pyproject.toml
index c9f81850f..a79c19ae9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.139.0rc3"
+version = "1.139.0"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later OR LicenseRef-Element-Commercial"