diff --git a/CHANGES.md b/CHANGES.md
index f4f498ea93..0337374035 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,62 @@
+# Synapse 1.164.0rc1 (2026-10-20)
+
+## Features
+
+- MSC4140: Add a dedicated endpoint for scheduling delayed events. ([\#19354](https://github.com/element-hq/synapse/issues/19354))
+- Stabilise [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222): support the stable `use_state_after` query parameter and `state_after` response field on `/sync`, as per Matrix v1.16, and remove the `msc4222_enabled` experimental config flag. ([\#20170](https://github.com/element-hq/synapse/issues/20170))
+- Require authentication for the [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140) delayed event management endpoints, restrict them to the requesting user's own delayed events, and allow guests to use them. ([\#20257](https://github.com/element-hq/synapse/issues/20257))
+- [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Reject requests to schedule a delayed event that the sender could not send at that time, such as in a room they are not joined to, unless the event changes their own membership. ([\#20266](https://github.com/element-hq/synapse/issues/20266))
+- Add the `m.preview_url` capability (stabilizes support for MSC4452). ([\#20298](https://github.com/element-hq/synapse/issues/20298))
+- Advertise support for Matrix v1.16. ([\#20333](https://github.com/element-hq/synapse/issues/20333))
+- Advertise support for Matrix v1.17. ([\#20334](https://github.com/element-hq/synapse/issues/20334))
+- Catch up historical [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) to remote homeservers that are newly joining the room. ([\#20337](https://github.com/element-hq/synapse/issues/20337))
+- In legacy sync, lazy-load the memberships of the senders of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354). ([\#20362](https://github.com/element-hq/synapse/issues/20362))
+
+## Bugfixes
+
+- Fix media uploads that exceed a configured `media_upload_limits` limit leaving an orphaned file on disk with no corresponding database entry. ([\#20006](https://github.com/element-hq/synapse/issues/20006))
+- Fix the leave event being missing from `state_after` ([MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222)) on incremental `/sync` when the leaving user was the last local user in the room. ([\#20081](https://github.com/element-hq/synapse/issues/20081))
+- Reject setting `null` profile field values (following [an optional clause in the specification](https://spec.matrix.org/v1.19/client-server-api/#put_matrixclientv3profileuseridkeyname:~:text=Servers%20MAY%20reject%20null%20values%2E)), in order to avoid clients accidentally harming interoperability. ([\#20153](https://github.com/element-hq/synapse/issues/20153))
+- Fix a bug where server-default push rules that are disabled by the server's configuration, and thus not served to clients, could still be modified through the client API instead of returning a 404. ([\#20202](https://github.com/element-hq/synapse/issues/20202))
+- Default `request_token_inhibit_3pid_errors` to `true` to prevent `/requestToken` endpoints from revealing whether an email address is associated with an account. Contributed by @Manixhor. ([\#20243](https://github.com/element-hq/synapse/issues/20243))
+- Stop queueing events and ephemeral data for application services registered with `url: null` (such as bridges' double-puppeting registrations), which wasted work on every matching event and, when no other application service was registered, made Synapse read through its whole event history. ([\#20273](https://github.com/element-hq/synapse/issues/20273))
+- Apply the [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) history visibility exemptions on all client-server endpoints. ([\#20295](https://github.com/element-hq/synapse/issues/20295))
+- Set up `un_partial_stated_room_stream_sequence` during SQLite -> PostgreSQL DB porting, preventing a PostgreSQL sequence inconsistency error on startup. ([\#20302](https://github.com/element-hq/synapse/issues/20302))
+- Fix new state saved with the last local user's leave being missing from `state_after` ([MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222)) on incremental `/sync`. ([\#20314](https://github.com/element-hq/synapse/issues/20314))
+- Fix verbose Pydantic validation error messages leaking internal details in client API error responses. ([\#20321](https://github.com/element-hq/synapse/issues/20321))
+- Prevent [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) being sticky when they were redacted in the same persistence batch. ([\#20322](https://github.com/element-hq/synapse/issues/20322))
+- Remove the stickiness of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) when they are redacted after persistence. ([\#20323](https://github.com/element-hq/synapse/issues/20323))
+- Fix the expiry of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) being reported differently to how the server tracks them. ([\#20324](https://github.com/element-hq/synapse/issues/20324))
+- Filter out [MSC4426](https://github.com/matrix-org/matrix-spec-proposals/pull/4426) User Status fields for remote user profile lookups which become stale on clients without [MSC4259](https://github.com/matrix-org/matrix-spec-proposals/pull/4259) to get updates about profiles over federation. ([\#20328](https://github.com/element-hq/synapse/issues/20328))
+- Stop forwarding non-compliant (grandfathered historical) remote user IDs to clients outside the context of an event, by dropping their incoming presence, typing, read receipt, to-device and signing key updates, and by leaving them out of `/sync` device list changes and newly joined users' presence, as per [the spec](https://spec.matrix.org/v1.19/appendices/#historical-user-ids). ([\#20338](https://github.com/element-hq/synapse/issues/20338))
+- Fix a bug introduced in Synapse v1.130.0 where Sliding Sync would consider a displayname or avatar change in a room to mean that room was newly-joined. ([\#20339](https://github.com/element-hq/synapse/issues/20339))
+
+## Improved Documentation
+
+- Document that the `/auth_metadata` endpoints can be handled by workers. ([\#20331](https://github.com/element-hq/synapse/issues/20331))
+- Fix `complete` task status typo in `/redact_status` admin API docs. ([\#20379](https://github.com/element-hq/synapse/issues/20379))
+- Update `/redact_status` admin API docs to reflect better response example and document the `error` field. ([\#20380](https://github.com/element-hq/synapse/issues/20380))
+
+## Deprecations and Removals
+
+- [MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): No longer cancel a user's delayed state events due to a more recent state event sent from a different user. ([\#19495](https://github.com/element-hq/synapse/issues/19495))
+- Remove support for unstable [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965) `.well-known` endpoint. ([\#20143](https://github.com/element-hq/synapse/issues/20143))
+- Remove the legacy mention push rules by default, as per [MSC4210](https://github.com/matrix-org/matrix-spec-proposals/pull/4210). The `experimental_features.msc4210_enabled` flag now defaults to `true`. ([\#20220](https://github.com/element-hq/synapse/issues/20220))
+
+## Internal Changes
+
+- Add foundations for a Rust backed database pool and bump minimum supported Rust version to 1.85.0. ([\#19996](https://github.com/element-hq/synapse/issues/19996))
+- Stop reading from `event_edges.is_state` to prepare for dropping it. The column has been obsolete since Synapse 1.62.0. ([\#20069](https://github.com/element-hq/synapse/issues/20069))
+- Add support for joining [MSC4242](https://github.com/matrix-org/matrix-spec-proposals/pull/4242) rooms over federation. ([\#20194](https://github.com/element-hq/synapse/issues/20194))
+- Add a clock to the Rust side of Synapse, and use it in the rendezvous handlers. ([\#20294](https://github.com/element-hq/synapse/issues/20294))
+- Add `received_ts` to the in-memory event internal metadata struct. ([\#20312](https://github.com/element-hq/synapse/issues/20312))
+- Speed up push rule evaluation by not checking rules for the sender. ([\#20315](https://github.com/element-hq/synapse/issues/20315))
+- Require a strictly positive stickiness duration for [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354). ([\#20350](https://github.com/element-hq/synapse/issues/20350))
+- Remove unused `lxml` packaging and type-stub dependencies, and update URL-preview tests to check for BeautifulSoup instead. ([\#20356](https://github.com/element-hq/synapse/issues/20356))
+
+
+
+
 # Synapse 1.163.0 (2026-10-14)
 
 ## Bugfixes
diff --git a/changelog.d/19354.feature b/changelog.d/19354.feature
deleted file mode 100644
index 3d4e79e687..0000000000
--- a/changelog.d/19354.feature
+++ /dev/null
@@ -1 +0,0 @@
-MSC4140: Add a dedicated endpoint for scheduling delayed events.
diff --git a/changelog.d/19495.removal b/changelog.d/19495.removal
deleted file mode 100644
index 06e53d3969..0000000000
--- a/changelog.d/19495.removal
+++ /dev/null
@@ -1 +0,0 @@
-[MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): No longer cancel a user's delayed state events due to a more recent state event sent from a different user.
diff --git a/changelog.d/19996.misc b/changelog.d/19996.misc
deleted file mode 100644
index 0666dcaaa7..0000000000
--- a/changelog.d/19996.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add foundations for a Rust backed database pool and bump minimum supported Rust version to 1.85.0.
diff --git a/changelog.d/20006.bugfix b/changelog.d/20006.bugfix
deleted file mode 100644
index 0f51cc870c..0000000000
--- a/changelog.d/20006.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix media uploads that exceed a configured `media_upload_limits` limit leaving an orphaned file on disk with no corresponding database entry.
diff --git a/changelog.d/20069.misc b/changelog.d/20069.misc
deleted file mode 100644
index 474f95d0e6..0000000000
--- a/changelog.d/20069.misc
+++ /dev/null
@@ -1 +0,0 @@
-Stop reading from `event_edges.is_state` to prepare for dropping it. The column has been obsolete since Synapse 1.62.0.
\ No newline at end of file
diff --git a/changelog.d/20081.bugfix b/changelog.d/20081.bugfix
deleted file mode 100644
index c927f19e2a..0000000000
--- a/changelog.d/20081.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix the leave event being missing from `state_after` ([MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222)) on incremental `/sync` when the leaving user was the last local user in the room.
diff --git a/changelog.d/20143.removal b/changelog.d/20143.removal
deleted file mode 100644
index 1861595cc6..0000000000
--- a/changelog.d/20143.removal
+++ /dev/null
@@ -1 +0,0 @@
-Remove support for unstable [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965) `.well-known` endpoint.
diff --git a/changelog.d/20153.bugfix b/changelog.d/20153.bugfix
deleted file mode 100644
index c42d7af883..0000000000
--- a/changelog.d/20153.bugfix
+++ /dev/null
@@ -1,2 +0,0 @@
-Reject setting `null` profile field values (following [an optional clause in the specification](https://spec.matrix.org/v1.19/client-server-api/#put_matrixclientv3profileuseridkeyname:~:text=Servers%20MAY%20reject%20null%20values%2E)), in order to avoid clients accidentally harming interoperability.
-
diff --git a/changelog.d/20170.feature b/changelog.d/20170.feature
deleted file mode 100644
index aa271eb45f..0000000000
--- a/changelog.d/20170.feature
+++ /dev/null
@@ -1 +0,0 @@
-Stabilise [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222): support the stable `use_state_after` query parameter and `state_after` response field on `/sync`, as per Matrix v1.16, and remove the `msc4222_enabled` experimental config flag.
diff --git a/changelog.d/20194.misc b/changelog.d/20194.misc
deleted file mode 100644
index 40cdf30f80..0000000000
--- a/changelog.d/20194.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add support for joining [MSC4242](https://github.com/matrix-org/matrix-spec-proposals/pull/4242) rooms over federation.
diff --git a/changelog.d/20202.bugfix b/changelog.d/20202.bugfix
deleted file mode 100644
index 3416987fc8..0000000000
--- a/changelog.d/20202.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug where server-default push rules that are disabled by the server's configuration, and thus not served to clients, could still be modified through the client API instead of returning a 404.
diff --git a/changelog.d/20220.removal b/changelog.d/20220.removal
deleted file mode 100644
index 245a1592ff..0000000000
--- a/changelog.d/20220.removal
+++ /dev/null
@@ -1 +0,0 @@
-Remove the legacy mention push rules by default, as per [MSC4210](https://github.com/matrix-org/matrix-spec-proposals/pull/4210). The `experimental_features.msc4210_enabled` flag now defaults to `true`.
diff --git a/changelog.d/20243.bugfix b/changelog.d/20243.bugfix
deleted file mode 100644
index 8cb821303e..0000000000
--- a/changelog.d/20243.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Default `request_token_inhibit_3pid_errors` to `true` to prevent `/requestToken` endpoints from revealing whether an email address is associated with an account. Contributed by @Manixhor.
diff --git a/changelog.d/20257.feature b/changelog.d/20257.feature
deleted file mode 100644
index 8bda322dc4..0000000000
--- a/changelog.d/20257.feature
+++ /dev/null
@@ -1 +0,0 @@
-Require authentication for the [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140) delayed event management endpoints, restrict them to the requesting user's own delayed events, and allow guests to use them.
diff --git a/changelog.d/20266.feature b/changelog.d/20266.feature
deleted file mode 100644
index d6208770f9..0000000000
--- a/changelog.d/20266.feature
+++ /dev/null
@@ -1 +0,0 @@
-[MSC4140: Cancellable delayed events](https://github.com/matrix-org/matrix-spec-proposals/pull/4140): Reject requests to schedule a delayed event that the sender could not send at that time, such as in a room they are not joined to, unless the event changes their own membership.
diff --git a/changelog.d/20273.bugfix b/changelog.d/20273.bugfix
deleted file mode 100644
index d55b641c75..0000000000
--- a/changelog.d/20273.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Stop queueing events and ephemeral data for application services registered with `url: null` (such as bridges' double-puppeting registrations), which wasted work on every matching event and, when no other application service was registered, made Synapse read through its whole event history.
diff --git a/changelog.d/20294.misc b/changelog.d/20294.misc
deleted file mode 100644
index 45b6efc572..0000000000
--- a/changelog.d/20294.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add a clock to the Rust side of Synapse, and use it in the rendezvous handlers.
diff --git a/changelog.d/20295.bugfix b/changelog.d/20295.bugfix
deleted file mode 100644
index 85e428acb2..0000000000
--- a/changelog.d/20295.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Apply the [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) history visibility exemptions on all client-server endpoints.
\ No newline at end of file
diff --git a/changelog.d/20298.feature b/changelog.d/20298.feature
deleted file mode 100644
index cf2479f571..0000000000
--- a/changelog.d/20298.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add the `m.preview_url` capability (stabilizes support for MSC4452).
diff --git a/changelog.d/20302.bugfix b/changelog.d/20302.bugfix
deleted file mode 100644
index f563c2959d..0000000000
--- a/changelog.d/20302.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Set up `un_partial_stated_room_stream_sequence` during SQLite -> PostgreSQL DB porting, preventing a PostgreSQL sequence inconsistency error on startup.
diff --git a/changelog.d/20312.misc b/changelog.d/20312.misc
deleted file mode 100644
index e56408bda7..0000000000
--- a/changelog.d/20312.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add `received_ts` to the in-memory event internal metadata struct.
\ No newline at end of file
diff --git a/changelog.d/20314.bugfix b/changelog.d/20314.bugfix
deleted file mode 100644
index f48f96aa82..0000000000
--- a/changelog.d/20314.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix new state saved with the last local user's leave being missing from `state_after` ([MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222)) on incremental `/sync`.
diff --git a/changelog.d/20315.misc b/changelog.d/20315.misc
deleted file mode 100644
index c4ae25ed03..0000000000
--- a/changelog.d/20315.misc
+++ /dev/null
@@ -1 +0,0 @@
-Speed up push rule evaluation by not checking rules for the sender.
diff --git a/changelog.d/20321.bugfix b/changelog.d/20321.bugfix
deleted file mode 100644
index 09d9884530..0000000000
--- a/changelog.d/20321.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix verbose Pydantic validation error messages leaking internal details in client API error responses.
diff --git a/changelog.d/20322.bugfix b/changelog.d/20322.bugfix
deleted file mode 100644
index 3614b64d8a..0000000000
--- a/changelog.d/20322.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Prevent [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) being sticky when they were redacted in the same persistence batch.
\ No newline at end of file
diff --git a/changelog.d/20323.bugfix b/changelog.d/20323.bugfix
deleted file mode 100644
index 7b5cd5fbef..0000000000
--- a/changelog.d/20323.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Remove the stickiness of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) when they are redacted after persistence.
\ No newline at end of file
diff --git a/changelog.d/20324.bugfix b/changelog.d/20324.bugfix
deleted file mode 100644
index 62478357dd..0000000000
--- a/changelog.d/20324.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix the expiry of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) being reported differently to how the server tracks them.
\ No newline at end of file
diff --git a/changelog.d/20328.bugfix b/changelog.d/20328.bugfix
deleted file mode 100644
index 54d33d0d47..0000000000
--- a/changelog.d/20328.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Filter out [MSC4426](https://github.com/matrix-org/matrix-spec-proposals/pull/4426) User Status fields for remote user profile lookups which become stale on clients without [MSC4259](https://github.com/matrix-org/matrix-spec-proposals/pull/4259) to get updates about profiles over federation.
\ No newline at end of file
diff --git a/changelog.d/20331.doc b/changelog.d/20331.doc
deleted file mode 100644
index 6c6ece86ce..0000000000
--- a/changelog.d/20331.doc
+++ /dev/null
@@ -1 +0,0 @@
-Document that the `/auth_metadata` endpoints can be handled by workers.
diff --git a/changelog.d/20333.feature b/changelog.d/20333.feature
deleted file mode 100644
index aab5c8f812..0000000000
--- a/changelog.d/20333.feature
+++ /dev/null
@@ -1 +0,0 @@
-Advertise support for Matrix v1.16.
diff --git a/changelog.d/20334.feature b/changelog.d/20334.feature
deleted file mode 100644
index e8483f344f..0000000000
--- a/changelog.d/20334.feature
+++ /dev/null
@@ -1 +0,0 @@
-Advertise support for Matrix v1.17.
diff --git a/changelog.d/20337.feature b/changelog.d/20337.feature
deleted file mode 100644
index b2050b8548..0000000000
--- a/changelog.d/20337.feature
+++ /dev/null
@@ -1 +0,0 @@
-Catch up historical [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354) to remote homeservers that are newly joining the room.
\ No newline at end of file
diff --git a/changelog.d/20338.bugfix b/changelog.d/20338.bugfix
deleted file mode 100644
index 18fb50e741..0000000000
--- a/changelog.d/20338.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Stop forwarding non-compliant (grandfathered historical) remote user IDs to clients outside the context of an event, by dropping their incoming presence, typing, read receipt, to-device and signing key updates, and by leaving them out of `/sync` device list changes and newly joined users' presence, as per [the spec](https://spec.matrix.org/v1.19/appendices/#historical-user-ids).
diff --git a/changelog.d/20339.bugfix b/changelog.d/20339.bugfix
deleted file mode 100644
index 1f4cfc53dc..0000000000
--- a/changelog.d/20339.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug introduced in Synapse v1.130.0 where Sliding Sync would consider a displayname or avatar change in a room to mean that room was newly-joined.
\ No newline at end of file
diff --git a/changelog.d/20350.misc b/changelog.d/20350.misc
deleted file mode 100644
index 5eb9ec959c..0000000000
--- a/changelog.d/20350.misc
+++ /dev/null
@@ -1 +0,0 @@
-Require a strictly positive stickiness duration for [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354).
\ No newline at end of file
diff --git a/changelog.d/20356.misc b/changelog.d/20356.misc
deleted file mode 100644
index 8279850972..0000000000
--- a/changelog.d/20356.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove unused `lxml` packaging and type-stub dependencies, and update URL-preview tests to check for BeautifulSoup instead.
diff --git a/changelog.d/20362.feature b/changelog.d/20362.feature
deleted file mode 100644
index c9acabecf9..0000000000
--- a/changelog.d/20362.feature
+++ /dev/null
@@ -1 +0,0 @@
-In legacy sync, lazy-load the memberships of the senders of [MSC4354 Sticky Events](https://github.com/matrix-org/matrix-spec-proposals/pull/4354).
\ No newline at end of file
diff --git a/changelog.d/20379.doc b/changelog.d/20379.doc
deleted file mode 100644
index baffd79c68..0000000000
--- a/changelog.d/20379.doc
+++ /dev/null
@@ -1 +0,0 @@
-Fix `complete` task status typo in `/redact_status` admin API docs.
diff --git a/changelog.d/20380.doc b/changelog.d/20380.doc
deleted file mode 100644
index de359fad75..0000000000
--- a/changelog.d/20380.doc
+++ /dev/null
@@ -1 +0,0 @@
-Update `/redact_status` admin API docs to reflect better response example and document the `error` field.
diff --git a/debian/changelog b/debian/changelog
index f54149e400..735acf05cf 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,9 @@
-matrix-synapse-py3 (1.163.0+unreleased1) UNRELEASED; urgency=medium
+matrix-synapse-py3 (1.164.0~rc1) stable; urgency=medium
 
   * Stop preinstalling the unused Python lxml package.
+  * New synapse release 1.164.0rc1.
 
- -- Synapse Packaging team <packages@matrix.org>  Wed, 14 Oct 2026 11:30:04 +0100
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 20 Oct 2026 14:46:37 +0000
 
 matrix-synapse-py3 (1.163.0) stable; urgency=medium
 
diff --git a/pyproject.toml b/pyproject.toml
index 2454a8429d..23c1e22500 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "matrix-synapse"
-version = "1.163.0"
+version = "1.164.0rc1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 readme = "README.rst"
 authors = [
diff --git a/schema/synapse-config.schema.yaml b/schema/synapse-config.schema.yaml
index 0ab65a5300..22ed084c72 100644
--- a/schema/synapse-config.schema.yaml
+++ b/schema/synapse-config.schema.yaml
@@ -1,5 +1,5 @@
 $schema: https://element-hq.github.io/synapse/latest/schema/v1/meta.schema.json
-$id: https://element-hq.github.io/synapse/schema/synapse/v1.163/synapse-config.schema.json
+$id: https://element-hq.github.io/synapse/schema/synapse/v1.164/synapse-config.schema.json
 type: object
 properties:
   modules: