diff --git a/CHANGES.md b/CHANGES.md
index 1d123abc195a2ee855d36c28e8e2c174dff0d744..da588454c741cc6750bd41a1e64acde20c368860 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,94 @@
-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).
 
+We have also stopped building `.deb` packages for Ubuntu 21.10 as it is no longer an active version of Ubuntu.
+
+
+Features
+--------
+
+- Improve error messages when media thumbnails cannot be served. ([\#13038](https://github.com/matrix-org/synapse/issues/13038))
+- Allow pagination from remote event after discovering it from [MSC3030](https://github.com/matrix-org/matrix-spec-proposals/pull/3030) `/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 APIs. 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 throttles additional joins if that rate grows too large. ([\#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), [\#13276](https://github.com/matrix-org/synapse/issues/13276))
+- Support Implicit TLS (TLS without using a STARTTLS upgrade, typically on port 465) 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 1.40.0 where a user invited to a restricted room would be briefly unable to join. ([\#13270](https://github.com/matrix-org/synapse/issues/13270))
+- Fix a 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`. ([\#13284](https://github.com/matrix-org/synapse/issues/13284), [\#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))
+- Document that certain config options were added or changed in Synapse 1.62. 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 that were formerly 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 building `.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 transaction 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. Contributed by @Vetchu. ([\#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))
+- 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))
+- Upgrade from Poetry 1.1.12 to 1.1.14, 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 acb2558d57a6dbfecb3a8324415fa9a50bc7dd9f..0000000000000000000000000000000000000000
--- 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 f66bb3ec32fcc854dba518b722c85f8c8c12a371..0000000000000000000000000000000000000000
--- 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 0aafd6a4d914bcfca9154fe0b1a1abd46ac0053d..0000000000000000000000000000000000000000
--- 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 1278f1b4e992fe8fc656320d96e4bb227206ac14..0000000000000000000000000000000000000000
--- 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 f1e55ae4764724b6f973d9ac5fed7d32d90d13a4..0000000000000000000000000000000000000000
--- 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 124a1b3662dd4b5d0c1ee161b0e504ec481ed361..0000000000000000000000000000000000000000
--- 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 f273b3d6ca1c15ee02a1d658fd7075b7aec24f3f..0000000000000000000000000000000000000000
--- 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 a7dffd1c48756df06b48f76fbec966ca1ee9eb7d..0000000000000000000000000000000000000000
--- 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 5aef2432df39e95263b7a74f54ac98945a1d48f1..0000000000000000000000000000000000000000
--- 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 d89aa9aa75ce53cd3a1c9885e4bed0b010acf7a3..0000000000000000000000000000000000000000
--- 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 b0c5f090ee7bb4d7330e97578573f3720a3d1c2c..0000000000000000000000000000000000000000
--- 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 3da35addb3fbf690eb0bbf2fc70ad4dad7bb400c..0000000000000000000000000000000000000000
--- 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 b1c8e5c7473c86295966149ab160bb0119a253be..0000000000000000000000000000000000000000
--- 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 9b0240fdc8c5c8b01dddc297d487fd86460ac2bc..0000000000000000000000000000000000000000
--- 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 41f8693b7425407831dcf00fb8abf08b2d321070..0000000000000000000000000000000000000000
--- 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 e750f9da499a3e92824f4ea9b8c86bae7202f03f..0000000000000000000000000000000000000000
--- 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 3eaea7c5e3546637b17fa5171f08987add683186..0000000000000000000000000000000000000000
--- 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 8f6045176d443883679bade875934c3899c0da5f..0000000000000000000000000000000000000000
--- 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 0567e47d64e081e8f24bc2ace8c0e5c97adc6f17..0000000000000000000000000000000000000000
--- 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 7f8ec0815f64800410a815421355eb365fd3c4e7..0000000000000000000000000000000000000000
--- 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 526369e4033326e5c1e76632a4eb455d8930d7d9..0000000000000000000000000000000000000000
--- 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 cba6b9ee0ff095e89413be7ec36226b910ca1c42..0000000000000000000000000000000000000000
--- 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 cba6b9ee0ff095e89413be7ec36226b910ca1c42..0000000000000000000000000000000000000000
--- 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 cba6b9ee0ff095e89413be7ec36226b910ca1c42..0000000000000000000000000000000000000000
--- 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 5fc1388520b51f2e1c3c240b28b2e55d03c43023..0000000000000000000000000000000000000000
--- 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 a187c46aa6095d324a45e786fb9d935243dd6f9f..0000000000000000000000000000000000000000
--- 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 b55ff32c7624917e37ea966e7788f7f5c3e32716..0000000000000000000000000000000000000000
--- 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 3eaea7c5e3546637b17fa5171f08987add683186..0000000000000000000000000000000000000000
--- 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 91e1d1e7eb1eda4208e7f5ccaeb66a511595efd3..0000000000000000000000000000000000000000
--- 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 d583acb81b3b00cdcf1d1896c2bea39b4d5f0210..0000000000000000000000000000000000000000
--- 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 a3344143203ea36f028c085e0bbc3e558aff62ec..0000000000000000000000000000000000000000
--- 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 d023b25eea27525438ee00ae8c271300f8f3d24a..0000000000000000000000000000000000000000
--- 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 b50e60d0296273fffa852c56cb0e665b76256c50..0000000000000000000000000000000000000000
--- 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 a3344143203ea36f028c085e0bbc3e558aff62ec..0000000000000000000000000000000000000000
--- 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 068d158ed5d8a17f30a06cb7405084fd25be4099..0000000000000000000000000000000000000000
--- 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 49e9377c7958eadd8f31b2daa06649151fa7f070..0000000000000000000000000000000000000000
--- 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 a083d2af2a191e57e4e324f169ba147d1327bace..0000000000000000000000000000000000000000
--- 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 dea51d136279d08321c5630fa325967e42f8a81a..0000000000000000000000000000000000000000
--- 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 fa9743a10ef3329ebd5f57d0283ee7dc33f2e846..0000000000000000000000000000000000000000
--- 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 b7bcbadb5b1cbfa891c90441e66dd9cb3bf32f30..0000000000000000000000000000000000000000
--- 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 67fec55330b0b51252af233ad64b1daafd5160b4..0000000000000000000000000000000000000000
--- 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 ff0eb2b4a1b3a61dbecae064a11667baa394863a..0000000000000000000000000000000000000000
--- 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 545a62369f43d5294d7c3c48ae1ecad155318f64..0000000000000000000000000000000000000000
--- 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 a9d5566873f481de50401bbdfb1072c9a2f36c8b..0000000000000000000000000000000000000000
--- 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 ee58add3c470a2bbd9c78281d7d6062ae78af97e..0000000000000000000000000000000000000000
--- 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 03f64ab17186e932063575505bad40901112a057..0000000000000000000000000000000000000000
--- 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 45b628ce133d56966725fb2e9e6bfb0f1c115815..0000000000000000000000000000000000000000
--- 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 7f8ec0815f64800410a815421355eb365fd3c4e7..0000000000000000000000000000000000000000
--- 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 eaf570e058a50cf244a058118a15d492cc188212..0000000000000000000000000000000000000000
--- 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 4be81c675c30546fd04245562fbe588360dafed9..0000000000000000000000000000000000000000
--- 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 0f3c1f0afd4199bc50f1fa489ec0bd6d6a2168de..0000000000000000000000000000000000000000
--- 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 75c71ef27a4528853198bde39629f0b4a587ff5d..0000000000000000000000000000000000000000
--- 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 e0ebd2b51ff07b8516afebb9f4f6daada9f44b6d..0000000000000000000000000000000000000000
--- 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 f5cd26b862d4db56db206e47fcce4d9d19ce34c0..0000000000000000000000000000000000000000
--- 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 d33cf3a25af3b7cba10d3ef94b72df315fd380e6..0000000000000000000000000000000000000000
--- 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 3caa94a2f66c822e8f16685728f0c6e9755198a7..0000000000000000000000000000000000000000
--- 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 30670cf56c1fa5302b6226c6e90e6eab1146535f..0000000000000000000000000000000000000000
--- 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 8112286671d7fa10579c57d3452f45ae568dac13..0000000000000000000000000000000000000000
--- 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 c80578ce95b20b08df9796ca69728df2b2bc58c9..0000000000000000000000000000000000000000
--- 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 4df9a9f6d747465bfe5e4b60ff987a743f4d681f..0000000000000000000000000000000000000000
--- 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 57cbdf05c81be81e107aad79374cbaba73a708ae..0000000000000000000000000000000000000000
--- 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 7acf6d3f34b0c63d8d339098e1a65197b5c36ab3..0000000000000000000000000000000000000000
--- 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 ce9c816b9c1a502bd12346727f7eff9ef1115adc..0000000000000000000000000000000000000000
--- 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 fca187df9210ee6a5b7672ab188a594392756a22..0000000000000000000000000000000000000000
--- 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 c80578ce95b20b08df9796ca69728df2b2bc58c9..0000000000000000000000000000000000000000
--- 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 4df9a9f6d747465bfe5e4b60ff987a743f4d681f..0000000000000000000000000000000000000000
--- 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 46c496a6a06cda71fb1cd1b7f7400a0e2ed2d28b..0000000000000000000000000000000000000000
--- 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 81287142997b69b752302bdce9052289a4065e7a..0000000000000000000000000000000000000000
--- 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 e08ee7866a321e1c22435eda68006183e26d0f6e..0000000000000000000000000000000000000000
--- 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 c80578ce95b20b08df9796ca69728df2b2bc58c9..0000000000000000000000000000000000000000
--- 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 9417f8714f9b6fdb771093a4cab1ed6893a2f487..38030a5e1935b24a75ba5c406222f434bf513e93 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 4da1331c932d02ba34c74e64fe67ddc6774a68f0..c707737590ea4470c1746252666fdb629db91d19 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"