diff --git a/CHANGES.md b/CHANGES.md
index 1d123abc1..979e35370 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,9 +1,95 @@
-Synapse vNext
-=============
+Synapse 1.64.0rc1 (2022-07-26)
+==============================
 
 As of this release, Synapse no longer allows the tasks of verifying email address ownership, and password reset confirmation, to be delegated to an identity server. For more information, see the [upgrade notes](https://matrix-org.github.io/synapse/v1.64/upgrade.html#upgrading-to-v1640).
 
 
+Features
+--------
+
+- Provide more info why we don't have any thumbnails to serve. ([\#13038](https://github.com/matrix-org/synapse/issues/13038))
+- Allow pagination from remote event after discovering it from MSC3030 `/timestamp_to_event`. ([\#13205](https://github.com/matrix-org/synapse/issues/13205))
+- Add a `room_type` field in the responses for the list room and room details admin API. Contributed by @andrewdoh. ([\#13208](https://github.com/matrix-org/synapse/issues/13208))
+- Add support for room version 10. ([\#13220](https://github.com/matrix-org/synapse/issues/13220))
+- Add per-room rate limiting for room joins. For each room, Synapse now monitors the rate of join events in that room, and throttle additional joins if that rate grows too large. ([\#13276](https://github.com/matrix-org/synapse/issues/13276))
+- Support Implicit TLS for sending emails, enabled by the new option `force_tls`. Contributed by Jan Schär. ([\#13317](https://github.com/matrix-org/synapse/issues/13317))
+
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.15.0 where adding a user through the Synapse Admin API with a phone number would fail if the "enable_email_notifs" and "email_notifs_for_new_users" options were enabled. Contributed by @thomasweston12. ([\#13263](https://github.com/matrix-org/synapse/issues/13263))
+- Fix a bug introduced in Synapse 1.40 where a user invited to a restricted room would be briefly unable to join. ([\#13270](https://github.com/matrix-org/synapse/issues/13270))
+- Fix long-standing bug where in rare instances Synapse could store the incorrect state for a room after a state resolution. ([\#13278](https://github.com/matrix-org/synapse/issues/13278))
+- Fix a bug introduced in v1.18.0 where the `synapse_pushers` metric would overcount pushers when they are replaced. ([\#13296](https://github.com/matrix-org/synapse/issues/13296))
+- Disable autocorrection and autocapitalisation on the username text field shown during registration when using SSO. ([\#13350](https://github.com/matrix-org/synapse/issues/13350))
+- Update locked version of `frozendict` to 2.3.3, which has fixes for memory leaks affecting `/sync`. ([\#13352](https://github.com/matrix-org/synapse/issues/13352))
+
+
+Improved Documentation
+----------------------
+
+- Provide an example of using the Admin API. Contributed by @jejo86. ([\#13231](https://github.com/matrix-org/synapse/issues/13231))
+- Move the documentation for how URL previews work to the URL preview module. ([\#13233](https://github.com/matrix-org/synapse/issues/13233), [\#13261](https://github.com/matrix-org/synapse/issues/13261))
+- Add another `contrib` script to help set up worker processes. Contributed by @villepeh. ([\#13271](https://github.com/matrix-org/synapse/issues/13271))
+- Add notes when config options where changed. Contributed by @behrmann. ([\#13314](https://github.com/matrix-org/synapse/issues/13314))
+- Document the new `rc_invites.per_issuer` throttling option added in Synapse 1.63. ([\#13333](https://github.com/matrix-org/synapse/issues/13333))
+- Mention that BuildKit is needed when building Docker images for tests. ([\#13338](https://github.com/matrix-org/synapse/issues/13338))
+- Improve Caddy reverse proxy documentation. ([\#13344](https://github.com/matrix-org/synapse/issues/13344))
+
+
+Deprecations and Removals
+-------------------------
+
+- Drop tables used for groups/communities. ([\#12967](https://github.com/matrix-org/synapse/issues/12967))
+- Drop support for delegating email verification to an external server. ([\#13192](https://github.com/matrix-org/synapse/issues/13192))
+- Drop support for calling `/_matrix/client/v3/account/3pid/bind` without an `id_access_token`, which was not permitted by the spec. Contributed by @Vetchu. ([\#13239](https://github.com/matrix-org/synapse/issues/13239))
+- Stop builindg `.deb` packages for Ubuntu 21.10 (Impish Indri), which has reached end of life. ([\#13326](https://github.com/matrix-org/synapse/issues/13326))
+
+
+Internal Changes
+----------------
+
+- Use lower isolation level when purging rooms to avoid serialization errors. Contributed by Nick @ Beeper. ([\#12942](https://github.com/matrix-org/synapse/issues/12942))
+- Remove code which incorrectly attempted to reconcile state with remote servers when processing incoming events. ([\#12943](https://github.com/matrix-org/synapse/issues/12943))
+- Make the AS login method call `Auth.get_user_by_req` for checking the AS token. ([\#13094](https://github.com/matrix-org/synapse/issues/13094))
+- Always use a version of canonicaljson that supports the C implementation of frozendict. ([\#13172](https://github.com/matrix-org/synapse/issues/13172))
+- Add prometheus counters for ephemeral events and to device messages pushed to app services. Contributed by Brad @ Beeper. ([\#13175](https://github.com/matrix-org/synapse/issues/13175))
+- Refactor receipts servlet logic to avoid duplicated code. ([\#13198](https://github.com/matrix-org/synapse/issues/13198))
+- Preparation for database schema simplifications: populate `state_key` and `rejection_reason` for existing rows in the `events` table. ([\#13215](https://github.com/matrix-org/synapse/issues/13215))
+- Remove unused database table `event_reference_hashes`. ([\#13218](https://github.com/matrix-org/synapse/issues/13218))
+- Further reduce queries used sending events when creating new rooms. Contributed by Nick @ Beeper (@fizzadar). ([\#13224](https://github.com/matrix-org/synapse/issues/13224))
+- Call the v2 identity service `/3pid/unbind` endpoint, rather than v1. ([\#13240](https://github.com/matrix-org/synapse/issues/13240))
+- Use an asynchronous cache wrapper for the get event cache. Contributed by Nick @ Beeper (@fizzadar). ([\#13242](https://github.com/matrix-org/synapse/issues/13242), [\#13308](https://github.com/matrix-org/synapse/issues/13308))
+- Optimise federation sender and appservice pusher event stream processing queries. Contributed by Nick @ Beeper (@fizzadar). ([\#13251](https://github.com/matrix-org/synapse/issues/13251))
+- Preparatory work for a per-room rate limiter on joins. ([\#13253](https://github.com/matrix-org/synapse/issues/13253), [\#13254](https://github.com/matrix-org/synapse/issues/13254), [\#13255](https://github.com/matrix-org/synapse/issues/13255))
+- Log the stack when waiting for an entire room to be un-partial stated. ([\#13257](https://github.com/matrix-org/synapse/issues/13257))
+- Fix spurious warning when fetching state after a missing prev event. ([\#13258](https://github.com/matrix-org/synapse/issues/13258))
+- Clean-up tests for notifications. ([\#13260](https://github.com/matrix-org/synapse/issues/13260))
+- Do not fail build if complement with workers fails. ([\#13266](https://github.com/matrix-org/synapse/issues/13266))
+- Don't pull out state in `compute_event_context` for unconflicted state. ([\#13267](https://github.com/matrix-org/synapse/issues/13267), [\#13274](https://github.com/matrix-org/synapse/issues/13274))
+- Reduce the rebuild time for the complement-synapse docker image. ([\#13279](https://github.com/matrix-org/synapse/issues/13279))
+- Don't pull out the full state when creating an event. ([\#13281](https://github.com/matrix-org/synapse/issues/13281), [\#13307](https://github.com/matrix-org/synapse/issues/13307))
+- Update locked version of `frozendict` to 2.3.2, which has a fix for a memory leak. ([\#13284](https://github.com/matrix-org/synapse/issues/13284))
+- Upgrade from Poetry 1.1.14 to 1.1.12, to fix bugs when locking packages. ([\#13285](https://github.com/matrix-org/synapse/issues/13285))
+- Make `DictionaryCache` expire full entries if they haven't been queried in a while, even if specific keys have been queried recently. ([\#13292](https://github.com/matrix-org/synapse/issues/13292))
+- Use `HTTPStatus` constants in place of literals in tests. ([\#13297](https://github.com/matrix-org/synapse/issues/13297))
+- Improve performance of query  `_get_subset_users_in_room_with_profiles`. ([\#13299](https://github.com/matrix-org/synapse/issues/13299))
+- Up batch size of `bulk_get_push_rules` and `_get_joined_profiles_from_event_ids`. ([\#13300](https://github.com/matrix-org/synapse/issues/13300))
+- Remove unnecessary `json.dumps` from tests. ([\#13303](https://github.com/matrix-org/synapse/issues/13303))
+- Reduce memory usage of sending dummy events. ([\#13310](https://github.com/matrix-org/synapse/issues/13310))
+- Prevent formatting changes of [#3679](https://github.com/matrix-org/synapse/pull/3679) from appearing in `git blame`. ([\#13311](https://github.com/matrix-org/synapse/issues/13311))
+- Change `get_users_in_room` and `get_rooms_for_user` caches to enable pruning of old entries. ([\#13313](https://github.com/matrix-org/synapse/issues/13313))
+- Validate federation destinations and log an error if a destination is invalid. ([\#13318](https://github.com/matrix-org/synapse/issues/13318))
+- Fix `FederationClient.get_pdu()` returning events from the cache as `outliers` instead of original events we saw over federation. ([\#13320](https://github.com/matrix-org/synapse/issues/13320))
+- Reduce memory usage of state caches. ([\#13323](https://github.com/matrix-org/synapse/issues/13323))
+- Reduce the amount of state we store in the `state_cache`. ([\#13324](https://github.com/matrix-org/synapse/issues/13324))
+- Add missing type hints to open tracing module. ([\#13328](https://github.com/matrix-org/synapse/issues/13328), [\#13345](https://github.com/matrix-org/synapse/issues/13345), [\#13362](https://github.com/matrix-org/synapse/issues/13362))
+- Remove old base slaved store and de-duplicate cache ID generators. Contributed by Nick @ Beeper (@fizzadar). ([\#13329](https://github.com/matrix-org/synapse/issues/13329), [\#13349](https://github.com/matrix-org/synapse/issues/13349))
+- When reporting metrics is enabled, use ~8x less data to describe DB transaction metrics. ([\#13342](https://github.com/matrix-org/synapse/issues/13342))
+- Faster room joins: skip soft fail checks while Synapse only has partial room state, since the current membership of event senders may not be accurately known. ([\#13354](https://github.com/matrix-org/synapse/issues/13354))
+
+
 Synapse 1.63.1 (2022-07-20)
 ===========================
 
diff --git a/changelog.d/12942.misc b/changelog.d/12942.misc
deleted file mode 100644
index acb2558d5..000000000
--- a/changelog.d/12942.misc
+++ /dev/null
@@ -1 +0,0 @@
-Use lower isolation level when purging rooms to avoid serialization errors. Contributed by Nick @ Beeper.
diff --git a/changelog.d/12943.misc b/changelog.d/12943.misc
deleted file mode 100644
index f66bb3ec3..000000000
--- a/changelog.d/12943.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove code which incorrectly attempted to reconcile state with remote servers when processing incoming events.
diff --git a/changelog.d/12967.removal b/changelog.d/12967.removal
deleted file mode 100644
index 0aafd6a4d..000000000
--- a/changelog.d/12967.removal
+++ /dev/null
@@ -1 +0,0 @@
-Drop tables used for groups/communities.
diff --git a/changelog.d/13038.feature b/changelog.d/13038.feature
deleted file mode 100644
index 1278f1b4e..000000000
--- a/changelog.d/13038.feature
+++ /dev/null
@@ -1 +0,0 @@
-Provide more info why we don't have any thumbnails to serve.
diff --git a/changelog.d/13094.misc b/changelog.d/13094.misc
deleted file mode 100644
index f1e55ae47..000000000
--- a/changelog.d/13094.misc
+++ /dev/null
@@ -1 +0,0 @@
-Make the AS login method call `Auth.get_user_by_req` for checking the AS token.
diff --git a/changelog.d/13172.misc b/changelog.d/13172.misc
deleted file mode 100644
index 124a1b366..000000000
--- a/changelog.d/13172.misc
+++ /dev/null
@@ -1 +0,0 @@
-Always use a version of canonicaljson that supports the C implementation of frozendict.
diff --git a/changelog.d/13175.misc b/changelog.d/13175.misc
deleted file mode 100644
index f273b3d6c..000000000
--- a/changelog.d/13175.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add prometheus counters for ephemeral events and to device messages pushed to app services. Contributed by Brad @ Beeper.
diff --git a/changelog.d/13192.removal b/changelog.d/13192.removal
deleted file mode 100644
index a7dffd1c4..000000000
--- a/changelog.d/13192.removal
+++ /dev/null
@@ -1 +0,0 @@
-Drop support for delegating email verification to an external server.
diff --git a/changelog.d/13198.misc b/changelog.d/13198.misc
deleted file mode 100644
index 5aef2432d..000000000
--- a/changelog.d/13198.misc
+++ /dev/null
@@ -1 +0,0 @@
-Refactor receipts servlet logic to avoid duplicated code.
diff --git a/changelog.d/13205.feature b/changelog.d/13205.feature
deleted file mode 100644
index d89aa9aa7..000000000
--- a/changelog.d/13205.feature
+++ /dev/null
@@ -1 +0,0 @@
-Allow pagination from remote event after discovering it from MSC3030 `/timestamp_to_event`.
diff --git a/changelog.d/13208.feature b/changelog.d/13208.feature
deleted file mode 100644
index b0c5f090e..000000000
--- a/changelog.d/13208.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add a `room_type` field in the responses for the list room and room details admin API. Contributed by @andrewdoh.
\ No newline at end of file
diff --git a/changelog.d/13215.misc b/changelog.d/13215.misc
deleted file mode 100644
index 3da35addb..000000000
--- a/changelog.d/13215.misc
+++ /dev/null
@@ -1 +0,0 @@
-Preparation for database schema simplifications: populate `state_key` and `rejection_reason` for existing rows in the `events` table.
diff --git a/changelog.d/13218.misc b/changelog.d/13218.misc
deleted file mode 100644
index b1c8e5c74..000000000
--- a/changelog.d/13218.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove unused database table `event_reference_hashes`.
diff --git a/changelog.d/13220.feature b/changelog.d/13220.feature
deleted file mode 100644
index 9b0240fdc..000000000
--- a/changelog.d/13220.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add support for room version 10.
diff --git a/changelog.d/13224.misc b/changelog.d/13224.misc
deleted file mode 100644
index 41f8693b7..000000000
--- a/changelog.d/13224.misc
+++ /dev/null
@@ -1 +0,0 @@
-Further reduce queries used sending events when creating new rooms. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13231.doc b/changelog.d/13231.doc
deleted file mode 100644
index e750f9da4..000000000
--- a/changelog.d/13231.doc
+++ /dev/null
@@ -1 +0,0 @@
-Provide an example of using the Admin API. Contributed by @jejo86.
diff --git a/changelog.d/13233.doc b/changelog.d/13233.doc
deleted file mode 100644
index 3eaea7c5e..000000000
--- a/changelog.d/13233.doc
+++ /dev/null
@@ -1 +0,0 @@
-Move the documentation for how URL previews work to the URL preview module.
diff --git a/changelog.d/13239.removal b/changelog.d/13239.removal
deleted file mode 100644
index 8f6045176..000000000
--- a/changelog.d/13239.removal
+++ /dev/null
@@ -1 +0,0 @@
-Drop support for calling `/_matrix/client/v3/account/3pid/bind` without an `id_access_token`, which was not permitted by the spec. Contributed by @Vetchu.
\ No newline at end of file
diff --git a/changelog.d/13240.misc b/changelog.d/13240.misc
deleted file mode 100644
index 0567e47d6..000000000
--- a/changelog.d/13240.misc
+++ /dev/null
@@ -1 +0,0 @@
-Call the v2 identity service `/3pid/unbind` endpoint, rather than v1.
\ No newline at end of file
diff --git a/changelog.d/13242.misc b/changelog.d/13242.misc
deleted file mode 100644
index 7f8ec0815..000000000
--- a/changelog.d/13242.misc
+++ /dev/null
@@ -1 +0,0 @@
-Use an asynchronous cache wrapper for the get event cache. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13251.misc b/changelog.d/13251.misc
deleted file mode 100644
index 526369e40..000000000
--- a/changelog.d/13251.misc
+++ /dev/null
@@ -1 +0,0 @@
-Optimise federation sender and appservice pusher event stream processing queries. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13253.misc b/changelog.d/13253.misc
deleted file mode 100644
index cba6b9ee0..000000000
--- a/changelog.d/13253.misc
+++ /dev/null
@@ -1 +0,0 @@
-Preparatory work for a per-room rate limiter on joins.
diff --git a/changelog.d/13254.misc b/changelog.d/13254.misc
deleted file mode 100644
index cba6b9ee0..000000000
--- a/changelog.d/13254.misc
+++ /dev/null
@@ -1 +0,0 @@
-Preparatory work for a per-room rate limiter on joins.
diff --git a/changelog.d/13255.misc b/changelog.d/13255.misc
deleted file mode 100644
index cba6b9ee0..000000000
--- a/changelog.d/13255.misc
+++ /dev/null
@@ -1 +0,0 @@
-Preparatory work for a per-room rate limiter on joins.
diff --git a/changelog.d/13257.misc b/changelog.d/13257.misc
deleted file mode 100644
index 5fc138852..000000000
--- a/changelog.d/13257.misc
+++ /dev/null
@@ -1 +0,0 @@
-Log the stack when waiting for an entire room to be un-partial stated.
diff --git a/changelog.d/13258.misc b/changelog.d/13258.misc
deleted file mode 100644
index a187c46aa..000000000
--- a/changelog.d/13258.misc
+++ /dev/null
@@ -1 +0,0 @@
-Fix spurious warning when fetching state after a missing prev event.
diff --git a/changelog.d/13260.misc b/changelog.d/13260.misc
deleted file mode 100644
index b55ff32c7..000000000
--- a/changelog.d/13260.misc
+++ /dev/null
@@ -1 +0,0 @@
-Clean-up tests for notifications.
diff --git a/changelog.d/13261.doc b/changelog.d/13261.doc
deleted file mode 100644
index 3eaea7c5e..000000000
--- a/changelog.d/13261.doc
+++ /dev/null
@@ -1 +0,0 @@
-Move the documentation for how URL previews work to the URL preview module.
diff --git a/changelog.d/13263.bugfix b/changelog.d/13263.bugfix
deleted file mode 100644
index 91e1d1e7e..000000000
--- a/changelog.d/13263.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug introduced in Synapse 1.15.0 where adding a user through the Synapse Admin API with a phone number would fail if the "enable_email_notifs" and "email_notifs_for_new_users" options were enabled. Contributed by @thomasweston12.
diff --git a/changelog.d/13266.misc b/changelog.d/13266.misc
deleted file mode 100644
index d583acb81..000000000
--- a/changelog.d/13266.misc
+++ /dev/null
@@ -1 +0,0 @@
-Do not fail build if complement with workers fails.
diff --git a/changelog.d/13267.misc b/changelog.d/13267.misc
deleted file mode 100644
index a33441432..000000000
--- a/changelog.d/13267.misc
+++ /dev/null
@@ -1 +0,0 @@
-Don't pull out state in `compute_event_context` for unconflicted state.
diff --git a/changelog.d/13270.bugfix b/changelog.d/13270.bugfix
deleted file mode 100644
index d023b25ee..000000000
--- a/changelog.d/13270.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug introduced in Synapse 1.40 where a user invited to a restricted room would be briefly unable to join.
diff --git a/changelog.d/13271.doc b/changelog.d/13271.doc
deleted file mode 100644
index b50e60d02..000000000
--- a/changelog.d/13271.doc
+++ /dev/null
@@ -1 +0,0 @@
-Add another `contrib` script to help set up worker processes. Contributed by @villepeh.
diff --git a/changelog.d/13274.misc b/changelog.d/13274.misc
deleted file mode 100644
index a33441432..000000000
--- a/changelog.d/13274.misc
+++ /dev/null
@@ -1 +0,0 @@
-Don't pull out state in `compute_event_context` for unconflicted state.
diff --git a/changelog.d/13276.feature b/changelog.d/13276.feature
deleted file mode 100644
index 068d158ed..000000000
--- a/changelog.d/13276.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add per-room rate limiting for room joins. For each room, Synapse now monitors the rate of join events in that room, and throttle additional joins if that rate grows too large.
diff --git a/changelog.d/13278.bugfix b/changelog.d/13278.bugfix
deleted file mode 100644
index 49e9377c7..000000000
--- a/changelog.d/13278.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix long-standing bug where in rare instances Synapse could store the incorrect state for a room after a state resolution.
diff --git a/changelog.d/13279.misc b/changelog.d/13279.misc
deleted file mode 100644
index a083d2af2..000000000
--- a/changelog.d/13279.misc
+++ /dev/null
@@ -1 +0,0 @@
-Reduce the rebuild time for the complement-synapse docker image.
diff --git a/changelog.d/13281.misc b/changelog.d/13281.misc
deleted file mode 100644
index dea51d136..000000000
--- a/changelog.d/13281.misc
+++ /dev/null
@@ -1 +0,0 @@
-Don't pull out the full state when creating an event.
diff --git a/changelog.d/13284.misc b/changelog.d/13284.misc
deleted file mode 100644
index fa9743a10..000000000
--- a/changelog.d/13284.misc
+++ /dev/null
@@ -1 +0,0 @@
-Update locked version of `frozendict` to 2.3.2, which has a fix for a memory leak.
diff --git a/changelog.d/13285.misc b/changelog.d/13285.misc
deleted file mode 100644
index b7bcbadb5..000000000
--- a/changelog.d/13285.misc
+++ /dev/null
@@ -1 +0,0 @@
-Upgrade from Poetry 1.1.14 to 1.1.12, to fix bugs when locking packages.
diff --git a/changelog.d/13292.misc b/changelog.d/13292.misc
deleted file mode 100644
index 67fec5533..000000000
--- a/changelog.d/13292.misc
+++ /dev/null
@@ -1 +0,0 @@
-Make `DictionaryCache` expire full entries if they haven't been queried in a while, even if specific keys have been queried recently.
diff --git a/changelog.d/13296.bugfix b/changelog.d/13296.bugfix
deleted file mode 100644
index ff0eb2b4a..000000000
--- a/changelog.d/13296.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix a bug introduced in v1.18.0 where the `synapse_pushers` metric would overcount pushers when they are replaced.
diff --git a/changelog.d/13297.misc b/changelog.d/13297.misc
deleted file mode 100644
index 545a62369..000000000
--- a/changelog.d/13297.misc
+++ /dev/null
@@ -1 +0,0 @@
-Use `HTTPStatus` constants in place of literals in tests.
\ No newline at end of file
diff --git a/changelog.d/13299.misc b/changelog.d/13299.misc
deleted file mode 100644
index a9d556687..000000000
--- a/changelog.d/13299.misc
+++ /dev/null
@@ -1 +0,0 @@
-Improve performance of query  `_get_subset_users_in_room_with_profiles`.
diff --git a/changelog.d/13300.misc b/changelog.d/13300.misc
deleted file mode 100644
index ee58add3c..000000000
--- a/changelog.d/13300.misc
+++ /dev/null
@@ -1 +0,0 @@
-Up batch size of `bulk_get_push_rules` and `_get_joined_profiles_from_event_ids`.
diff --git a/changelog.d/13303.misc b/changelog.d/13303.misc
deleted file mode 100644
index 03f64ab17..000000000
--- a/changelog.d/13303.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove unnecessary `json.dumps` from tests.
\ No newline at end of file
diff --git a/changelog.d/13307.misc b/changelog.d/13307.misc
deleted file mode 100644
index 45b628ce1..000000000
--- a/changelog.d/13307.misc
+++ /dev/null
@@ -1 +0,0 @@
-Don't pull out the full state when creating an event.
\ No newline at end of file
diff --git a/changelog.d/13308.misc b/changelog.d/13308.misc
deleted file mode 100644
index 7f8ec0815..000000000
--- a/changelog.d/13308.misc
+++ /dev/null
@@ -1 +0,0 @@
-Use an asynchronous cache wrapper for the get event cache. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13310.misc b/changelog.d/13310.misc
deleted file mode 100644
index eaf570e05..000000000
--- a/changelog.d/13310.misc
+++ /dev/null
@@ -1 +0,0 @@
-Reduce memory usage of sending dummy events.
diff --git a/changelog.d/13311.misc b/changelog.d/13311.misc
deleted file mode 100644
index 4be81c675..000000000
--- a/changelog.d/13311.misc
+++ /dev/null
@@ -1 +0,0 @@
-Prevent formatting changes of [#3679](https://github.com/matrix-org/synapse/pull/3679) from appearing in `git blame`.
\ No newline at end of file
diff --git a/changelog.d/13313.misc b/changelog.d/13313.misc
deleted file mode 100644
index 0f3c1f0af..000000000
--- a/changelog.d/13313.misc
+++ /dev/null
@@ -1 +0,0 @@
-Change `get_users_in_room` and `get_rooms_for_user` caches to enable pruning of old entries.
diff --git a/changelog.d/13314.doc b/changelog.d/13314.doc
deleted file mode 100644
index 75c71ef27..000000000
--- a/changelog.d/13314.doc
+++ /dev/null
@@ -1 +0,0 @@
-Add notes when config options where changed. Contributed by @behrmann.
diff --git a/changelog.d/13317.feature b/changelog.d/13317.feature
deleted file mode 100644
index e0ebd2b51..000000000
--- a/changelog.d/13317.feature
+++ /dev/null
@@ -1 +0,0 @@
-Support Implicit TLS for sending emails, enabled by the new option `force_tls`. Contributed by Jan Schär.
diff --git a/changelog.d/13318.misc b/changelog.d/13318.misc
deleted file mode 100644
index f5cd26b86..000000000
--- a/changelog.d/13318.misc
+++ /dev/null
@@ -1 +0,0 @@
-Validate federation destinations and log an error if a destination is invalid.
diff --git a/changelog.d/13320.misc b/changelog.d/13320.misc
deleted file mode 100644
index d33cf3a25..000000000
--- a/changelog.d/13320.misc
+++ /dev/null
@@ -1 +0,0 @@
-Fix `FederationClient.get_pdu()` returning events from the cache as `outliers` instead of original events we saw over federation.
diff --git a/changelog.d/13323.misc b/changelog.d/13323.misc
deleted file mode 100644
index 3caa94a2f..000000000
--- a/changelog.d/13323.misc
+++ /dev/null
@@ -1 +0,0 @@
-Reduce memory usage of state caches.
diff --git a/changelog.d/13324.misc b/changelog.d/13324.misc
deleted file mode 100644
index 30670cf56..000000000
--- a/changelog.d/13324.misc
+++ /dev/null
@@ -1 +0,0 @@
-Reduce the amount of state we store in the `state_cache`.
diff --git a/changelog.d/13326.removal b/changelog.d/13326.removal
deleted file mode 100644
index 811228667..000000000
--- a/changelog.d/13326.removal
+++ /dev/null
@@ -1 +0,0 @@
-Stop builindg `.deb` packages for Ubuntu 21.10 (Impish Indri), which has reached end of life.
diff --git a/changelog.d/13328.misc b/changelog.d/13328.misc
deleted file mode 100644
index c80578ce9..000000000
--- a/changelog.d/13328.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add missing type hints to open tracing module.
diff --git a/changelog.d/13329.misc b/changelog.d/13329.misc
deleted file mode 100644
index 4df9a9f6d..000000000
--- a/changelog.d/13329.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove old base slaved store and de-duplicate cache ID generators. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13333.doc b/changelog.d/13333.doc
deleted file mode 100644
index 57cbdf05c..000000000
--- a/changelog.d/13333.doc
+++ /dev/null
@@ -1 +0,0 @@
-Document the new `rc_invites.per_issuer` throttling option added in Synapse 1.63.
\ No newline at end of file
diff --git a/changelog.d/13338.doc b/changelog.d/13338.doc
deleted file mode 100644
index 7acf6d3f3..000000000
--- a/changelog.d/13338.doc
+++ /dev/null
@@ -1 +0,0 @@
-Mention that BuildKit is needed when building Docker images for tests.
diff --git a/changelog.d/13342.misc b/changelog.d/13342.misc
deleted file mode 100644
index ce9c816b9..000000000
--- a/changelog.d/13342.misc
+++ /dev/null
@@ -1 +0,0 @@
-When reporting metrics is enabled, use ~8x less data to describe DB transaction metrics.
diff --git a/changelog.d/13344.doc b/changelog.d/13344.doc
deleted file mode 100644
index fca187df9..000000000
--- a/changelog.d/13344.doc
+++ /dev/null
@@ -1 +0,0 @@
-Improve Caddy reverse proxy documentation.
diff --git a/changelog.d/13345.misc b/changelog.d/13345.misc
deleted file mode 100644
index c80578ce9..000000000
--- a/changelog.d/13345.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add missing type hints to open tracing module.
diff --git a/changelog.d/13349.misc b/changelog.d/13349.misc
deleted file mode 100644
index 4df9a9f6d..000000000
--- a/changelog.d/13349.misc
+++ /dev/null
@@ -1 +0,0 @@
-Remove old base slaved store and de-duplicate cache ID generators. Contributed by Nick @ Beeper (@fizzadar).
diff --git a/changelog.d/13350.bugfix b/changelog.d/13350.bugfix
deleted file mode 100644
index 46c496a6a..000000000
--- a/changelog.d/13350.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Disable autocorrection and autocapitalisation on the username text field shown during registration when using SSO.
diff --git a/changelog.d/13352.bugfix b/changelog.d/13352.bugfix
deleted file mode 100644
index 812871429..000000000
--- a/changelog.d/13352.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Update locked version of `frozendict` to 2.3.3, which has fixes for memory leaks affecting `/sync`.
diff --git a/changelog.d/13354.misc b/changelog.d/13354.misc
deleted file mode 100644
index e08ee7866..000000000
--- a/changelog.d/13354.misc
+++ /dev/null
@@ -1 +0,0 @@
-Faster room joins: skip soft fail checks while Synapse only has partial room state, since the current membership of event senders may not be accurately known.
diff --git a/changelog.d/13362.misc b/changelog.d/13362.misc
deleted file mode 100644
index c80578ce9..000000000
--- a/changelog.d/13362.misc
+++ /dev/null
@@ -1 +0,0 @@
-Add missing type hints to open tracing module.
diff --git a/debian/changelog b/debian/changelog
index 9417f8714..38030a5e1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.64.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.64.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 26 Jul 2022 12:11:49 +0100
+
 matrix-synapse-py3 (1.63.1) stable; urgency=medium
 
   * New Synapse release 1.63.1.
diff --git a/pyproject.toml b/pyproject.toml
index 4da1331c9..c70773759 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ skip_gitignore = true
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.63.1"
+version = "1.64.0rc1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "Apache-2.0"