diff --git a/CHANGES.md b/CHANGES.md
index 36707db03b..958024ff0c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,17 @@
+Synapse 1.52.0 (2022-02-08)
+===========================
+
+No significant changes since 1.52.0rc1.
+
+Note that [Twisted 22.1.0](https://github.com/twisted/twisted/releases/tag/twisted-22.1.0)
+has recently been released, which fixes a [security issue](https://github.com/twisted/twisted/security/advisories/GHSA-92x2-jw7w-xvvx)
+within the Twisted library. We do not believe Synapse is affected by this vulnerability,
+though we advise server administrators who installed Synapse via pip to upgrade Twisted
+with `pip install --upgrade Twisted` as a matter of good practice. The Docker image
+`matrixdotorg/synapse` and the Debian packages from `packages.matrix.org` are using the
+updated library.
+
+
 Synapse 1.52.0rc1 (2022-02-01)
 ==============================
 
@@ -7,7 +21,7 @@ Features
 - Remove account data (including client config, push rules and ignored users) upon user deactivation. ([\#11621](https://github.com/matrix-org/synapse/issues/11621), [\#11788](https://github.com/matrix-org/synapse/issues/11788), [\#11789](https://github.com/matrix-org/synapse/issues/11789))
 - Add an admin API to reset connection timeouts for remote server. ([\#11639](https://github.com/matrix-org/synapse/issues/11639))
 - Add an admin API to get a list of rooms that federate with a given remote homeserver. ([\#11658](https://github.com/matrix-org/synapse/issues/11658))
-- Add a config flag to inhibit M_USER_IN_USE during registration. ([\#11743](https://github.com/matrix-org/synapse/issues/11743))
+- Add a config flag to inhibit `M_USER_IN_USE` during registration. ([\#11743](https://github.com/matrix-org/synapse/issues/11743))
 - Add a module callback to set username at registration. ([\#11790](https://github.com/matrix-org/synapse/issues/11790))
 - Allow configuring a maximum file size as well as a list of allowed content types for avatars. ([\#11846](https://github.com/matrix-org/synapse/issues/11846))
 
diff --git a/debian/changelog b/debian/changelog
index a458885655..64ea103f3e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.52.0) stable; urgency=medium
+
+  * New synapse release 1.52.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 08 Feb 2022 11:34:54 +0000
+
 matrix-synapse-py3 (1.52.0~rc1) stable; urgency=medium
 
   * New synapse release 1.52.0~rc1.
diff --git a/docs/upgrade.md b/docs/upgrade.md
index 8ce37bcdee..581fd7de53 100644
--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@@ -113,6 +113,18 @@ setting only applies to the root path `/` of Synapse's web server and no longer
 the `/_matrix/client/` path.
 
 
+# Upgrading to v1.52.0
+
+## Twisted security release
+
+Note that [Twisted 22.1.0](https://github.com/twisted/twisted/releases/tag/twisted-22.1.0)
+has recently been released, which fixes a [security issue](https://github.com/twisted/twisted/security/advisories/GHSA-92x2-jw7w-xvvx)
+within the Twisted library. We do not believe Synapse is affected by this vulnerability,
+though we advise server administrators who installed Synapse via pip to upgrade Twisted
+with `pip install --upgrade Twisted` as a matter of good practice. The Docker image
+`matrixdotorg/synapse` and the Debian packages from `packages.matrix.org` are using the
+updated library.
+
 # Upgrading to v1.51.0
 
 ## Deprecation of `webclient` listeners and non-HTTP(S) `web_client_location`
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 5e65033061..a23563937a 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -47,7 +47,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.52.0rc1"
+__version__ = "1.52.0"
 
 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