diff --git a/CHANGES.md b/CHANGES.md
index f9659d596d6cae5b8443ff33b453075010e68ef8..9908d7d9a008e065e238284736baff507b183f70 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,11 +1,14 @@
+Synapse 1.42.0 (2021-09-07)
+===========================
+
+This version of Synapse removes deprecated room-management admin APIs, removes out-of-date email pushers, and improves error handling for fallback templates for user-interactive authentication. For more information on these points, server administrators are encouraged to read [the upgrade notes](docs/upgrade.md#upgrading-to-v1420).
+
+No significant changes since 1.42.0rc2.
+
+
 Synapse 1.42.0rc2 (2021-09-06)
 ==============================
 
-This version of Synapse removes deprecated room-management admin APIs, removes out-of-date
-email pushers, and improves error handling for fallback templates for user-interactive
-authentication. For more information on these points, server administrators are
-encouraged to read [the upgrade notes](docs/upgrade.md#upgrading-to-v1420).
-
 Features
 --------
 
diff --git a/debian/changelog b/debian/changelog
index e865e0d2f643f911fe07cdd83a80f5047af5336a..4a37174a94e554bc57aa9548977587f98852c6ea 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.42.0) stable; urgency=medium
+
+  * New synapse release 1.42.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 07 Sep 2021 16:19:09 +0100
+
 matrix-synapse-py3 (1.42.0~rc2) stable; urgency=medium
 
   * New synapse release 1.42.0~rc2.
diff --git a/synapse/__init__.py b/synapse/__init__.py
index e4302d81a87f42794f62d1a91bad0500178264e9..dc7ae2429512edcf170edd1f8fec59b2a01b500b 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -47,7 +47,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.42.0rc2"
+__version__ = "1.42.0"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when