diff --git a/CHANGES.md b/CHANGES.md
index b71d4641b4..d9afcaa52b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,19 @@
+Synapse 1.27.0 (2021-02-16)
+===========================
+
+Note that this release includes a change in Synapse to use Redis as a cache ─ as well as a pub/sub mechanism ─ if Redis support is enabled for workers. No action is needed by server administrators, and we do not expect resource usage of the Redis instance to change dramatically.
+
+This release also changes the callback URI for OpenID Connect (OIDC) identity providers. If your server is configured to use single sign-on via an OIDC/OAuth2 IdP, you may need to make configuration changes. Please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
+
+This release also changes escaping of variables in the HTML templates for SSO or email notifications. If you have customised these templates, please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
+
+
+Bugfixes
+--------
+
+- Fix building Docker images for armv7. ([\#9405](https://github.com/matrix-org/synapse/issues/9405))
+
+
 Synapse 1.27.0rc2 (2021-02-11)
 ==============================
 
@@ -23,13 +39,6 @@ Improved Documentation
 Synapse 1.27.0rc1 (2021-02-02)
 ==============================
 
-Note that this release includes a change in Synapse to use Redis as a cache ─ as well as a pub/sub mechanism ─ if Redis support is enabled for workers. No action is needed by server administrators, and we do not expect resource usage of the Redis instance to change dramatically.
-
-This release also changes the callback URI for OpenID Connect (OIDC) identity providers. If your server is configured to use single sign-on via an OIDC/OAuth2 IdP, you may need to make configuration changes. Please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
-
-This release also changes escaping of variables in the HTML templates for SSO or email notifications. If you have customised these templates, please review [UPGRADE.rst](UPGRADE.rst) for more details on these changes.
-
-
 Features
 --------
 
diff --git a/debian/changelog b/debian/changelog
index 1a421a85bd..aa83d4e13e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,12 @@
-matrix-synapse-py3 (1.26.0+nmu1) UNRELEASED; urgency=medium
+matrix-synapse-py3 (1.27.0) stable; urgency=medium
 
+  [ Dan Callahan ]
   * Fix build on Ubuntu 16.04 LTS (Xenial).
 
- -- Dan Callahan <danc@element.io>  Thu, 28 Jan 2021 16:21:03 +0000
+  [ Synapse Packaging team ]
+  * New synapse release 1.27.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 16 Feb 2021 13:11:28 +0000
 
 matrix-synapse-py3 (1.26.0) stable; urgency=medium
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
index afd896ffc1..d619ee08ed 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -28,11 +28,13 @@ RUN apt-get update && apt-get install -y \
     libwebp-dev \
     libxml++2.6-dev \
     libxslt1-dev \
+    rustc \
     zlib1g-dev \
  && rm -rf /var/lib/apt/lists/*
 
 # Build dependencies that are not available as wheels, to speed up rebuilds
 RUN pip install --prefix="/install" --no-warn-script-location \
+        cryptography \
         frozendict \
         jaeger-client \
         opentracing \
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 283d6ffeff..359276427f 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -48,7 +48,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.27.0rc2"
+__version__ = "1.27.0"
 
 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