diff --git a/CHANGES.md b/CHANGES.md
index d517fc4eff..092dbdbf2d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,57 @@
+# Synapse 1.109.0rc1 (2024-06-04)
+
+### Features
+
+- Add the ability to auto-accept invites on the behalf of users. See the [`auto_accept_invites`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#auto-accept-invites) config option for details. ([\#17147](https://github.com/element-hq/synapse/issues/17147))
+- Add experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync/e2ee` endpoint for to-device messages and device encryption info. ([\#17167](https://github.com/element-hq/synapse/issues/17167))
+- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/issues/3916) by adding unstable media endpoints to `/_matrix/client`. ([\#17213](https://github.com/element-hq/synapse/issues/17213))
+- Add logging to tasks managed by the task scheduler, showing CPU and database usage. ([\#17219](https://github.com/element-hq/synapse/issues/17219))
+
+### Bugfixes
+
+- Fix deduplicating of membership events to not create unused state groups. ([\#17164](https://github.com/element-hq/synapse/issues/17164))
+- Fix bug where duplicate events could be sent down sync when using workers that are overloaded. ([\#17215](https://github.com/element-hq/synapse/issues/17215))
+- Ignore attempts to send to-device messages to bad users, to avoid log spam when we try to connect to the bad server. ([\#17240](https://github.com/element-hq/synapse/issues/17240))
+- Fix handling of duplicate concurrent uploading of device one-time-keys. ([\#17241](https://github.com/element-hq/synapse/issues/17241))
+- Fix reporting of default tags to Sentry, such as worker name. Broke in v1.108.0. ([\#17251](https://github.com/element-hq/synapse/issues/17251))
+- Fix bug where typing updates would not be sent when using workers after a restart. ([\#17252](https://github.com/element-hq/synapse/issues/17252))
+
+### Improved Documentation
+
+- Update the LemonLDAP documentation to say that claims should be explicitly included in the returned `id_token`, as Synapse won't request them. ([\#17204](https://github.com/element-hq/synapse/issues/17204))
+
+### Internal Changes
+
+- Improve DB usage when fetching related events. ([\#17083](https://github.com/element-hq/synapse/issues/17083))
+- Log exceptions when failing to auto-join new user according to the `auto_join_rooms` option. ([\#17176](https://github.com/element-hq/synapse/issues/17176))
+- Reduce work of calculating outbound device lists updates. ([\#17211](https://github.com/element-hq/synapse/issues/17211))
+- Improve performance of calculating device lists changes in `/sync`. ([\#17216](https://github.com/element-hq/synapse/issues/17216))
+- Move towards using `MultiWriterIdGenerator` everywhere. ([\#17226](https://github.com/element-hq/synapse/issues/17226))
+- Replaces all usages of `StreamIdGenerator` with `MultiWriterIdGenerator`. ([\#17229](https://github.com/element-hq/synapse/issues/17229))
+- Change the `allow_unsafe_locale` config option to also apply when setting up new databases. ([\#17238](https://github.com/element-hq/synapse/issues/17238))
+- Fix errors in logs about closing incorrect logging contexts when media gets rejected by a module. ([\#17239](https://github.com/element-hq/synapse/issues/17239), [\#17246](https://github.com/element-hq/synapse/issues/17246))
+- Clean out invalid destinations from `device_federation_outbox` table. ([\#17242](https://github.com/element-hq/synapse/issues/17242))
+- Stop logging errors when receiving invalid User IDs in key querys requests. ([\#17250](https://github.com/element-hq/synapse/issues/17250))
+
+
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.83 to 1.0.86. ([\#17220](https://github.com/element-hq/synapse/issues/17220))
+* Bump bcrypt from 4.1.2 to 4.1.3. ([\#17224](https://github.com/element-hq/synapse/issues/17224))
+* Bump lxml from 5.2.1 to 5.2.2. ([\#17261](https://github.com/element-hq/synapse/issues/17261))
+* Bump mypy-zope from 1.0.3 to 1.0.4. ([\#17262](https://github.com/element-hq/synapse/issues/17262))
+* Bump phonenumbers from 8.13.35 to 8.13.37. ([\#17235](https://github.com/element-hq/synapse/issues/17235))
+* Bump prometheus-client from 0.19.0 to 0.20.0. ([\#17233](https://github.com/element-hq/synapse/issues/17233))
+* Bump pyasn1 from 0.5.1 to 0.6.0. ([\#17223](https://github.com/element-hq/synapse/issues/17223))
+* Bump pyicu from 2.13 to 2.13.1. ([\#17236](https://github.com/element-hq/synapse/issues/17236))
+* Bump pyopenssl from 24.0.0 to 24.1.0. ([\#17234](https://github.com/element-hq/synapse/issues/17234))
+* Bump serde from 1.0.201 to 1.0.202. ([\#17221](https://github.com/element-hq/synapse/issues/17221))
+* Bump serde from 1.0.202 to 1.0.203. ([\#17232](https://github.com/element-hq/synapse/issues/17232))
+* Bump twine from 5.0.0 to 5.1.0. ([\#17225](https://github.com/element-hq/synapse/issues/17225))
+* Bump types-psycopg2 from 2.9.21.20240311 to 2.9.21.20240417. ([\#17222](https://github.com/element-hq/synapse/issues/17222))
+* Bump types-pyopenssl from 24.0.0.20240311 to 24.1.0.20240425. ([\#17260](https://github.com/element-hq/synapse/issues/17260))
+
 # Synapse 1.108.0 (2024-05-28)
 
 No significant changes since 1.108.0rc1.
diff --git a/changelog.d/17083.misc b/changelog.d/17083.misc
deleted file mode 100644
index 7c7cebea4e..0000000000
--- a/changelog.d/17083.misc
+++ /dev/null
@@ -1 +0,0 @@
-Improve DB usage when fetching related events.
diff --git a/changelog.d/17147.feature b/changelog.d/17147.feature
deleted file mode 100644
index 7c2cdb6bdf..0000000000
--- a/changelog.d/17147.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add the ability to auto-accept invites on the behalf of users. See the [`auto_accept_invites`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#auto-accept-invites) config option for details.
diff --git a/changelog.d/17164.bugfix b/changelog.d/17164.bugfix
deleted file mode 100644
index 597e2f14b0..0000000000
--- a/changelog.d/17164.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix deduplicating of membership events to not create unused state groups.
diff --git a/changelog.d/17167.feature b/changelog.d/17167.feature
deleted file mode 100644
index 5ad31db974..0000000000
--- a/changelog.d/17167.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync/e2ee` endpoint for To-Device messages and device encryption info.
diff --git a/changelog.d/17176.misc b/changelog.d/17176.misc
deleted file mode 100644
index cc9f2a5202..0000000000
--- a/changelog.d/17176.misc
+++ /dev/null
@@ -1 +0,0 @@
-Log exceptions when failing to auto-join new user according to the `auto_join_rooms` option.
\ No newline at end of file
diff --git a/changelog.d/17204.doc b/changelog.d/17204.doc
deleted file mode 100644
index 5a5a8f5107..0000000000
--- a/changelog.d/17204.doc
+++ /dev/null
@@ -1 +0,0 @@
-Update OIDC documentation: by default Matrix doesn't query userinfo endpoint, then claims should be put on id_token.
diff --git a/changelog.d/17211.misc b/changelog.d/17211.misc
deleted file mode 100644
index 144db03a40..0000000000
--- a/changelog.d/17211.misc
+++ /dev/null
@@ -1 +0,0 @@
-Reduce work of calculating outbound device lists updates.
diff --git a/changelog.d/17213.feature b/changelog.d/17213.feature
deleted file mode 100644
index ca60afa8f3..0000000000
--- a/changelog.d/17213.feature
+++ /dev/null
@@ -1 +0,0 @@
-Support MSC3916 by adding unstable media endpoints to `_matrix/client` (#17213).
\ No newline at end of file
diff --git a/changelog.d/17215.bugfix b/changelog.d/17215.bugfix
deleted file mode 100644
index 10981b798e..0000000000
--- a/changelog.d/17215.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix bug where duplicate events could be sent down sync when using workers that are overloaded.
diff --git a/changelog.d/17216.misc b/changelog.d/17216.misc
deleted file mode 100644
index bd55eeaa33..0000000000
--- a/changelog.d/17216.misc
+++ /dev/null
@@ -1 +0,0 @@
-Improve performance of calculating device lists changes in `/sync`.
diff --git a/changelog.d/17219.feature b/changelog.d/17219.feature
deleted file mode 100644
index f8277a89d8..0000000000
--- a/changelog.d/17219.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add logging to tasks managed by the task scheduler, showing CPU and database usage.
\ No newline at end of file
diff --git a/changelog.d/17226.misc b/changelog.d/17226.misc
deleted file mode 100644
index 7c023a5759..0000000000
--- a/changelog.d/17226.misc
+++ /dev/null
@@ -1 +0,0 @@
-Move towards using `MultiWriterIdGenerator` everywhere.
diff --git a/changelog.d/17229.misc b/changelog.d/17229.misc
deleted file mode 100644
index d411550786..0000000000
--- a/changelog.d/17229.misc
+++ /dev/null
@@ -1 +0,0 @@
-Replaces all usages of `StreamIdGenerator` with `MultiWriterIdGenerator`.
diff --git a/changelog.d/17238.misc b/changelog.d/17238.misc
deleted file mode 100644
index 261467e55c..0000000000
--- a/changelog.d/17238.misc
+++ /dev/null
@@ -1 +0,0 @@
-Change the `allow_unsafe_locale` config option to also apply when setting up new databases.
diff --git a/changelog.d/17239.misc b/changelog.d/17239.misc
deleted file mode 100644
index 9fca36bb29..0000000000
--- a/changelog.d/17239.misc
+++ /dev/null
@@ -1 +0,0 @@
-Fix errors in logs about closing incorrect logging contexts when media gets rejected by a module.
diff --git a/changelog.d/17240.bugfix b/changelog.d/17240.bugfix
deleted file mode 100644
index c596d270ce..0000000000
--- a/changelog.d/17240.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Ignore attempts to send to-device messages to bad users, to avoid log spam when we try to connect to the bad server.
diff --git a/changelog.d/17241.bugfix b/changelog.d/17241.bugfix
deleted file mode 100644
index 1b7f0bca94..0000000000
--- a/changelog.d/17241.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix handling of duplicate concurrent uploading of device one-time-keys.
diff --git a/changelog.d/17242.misc b/changelog.d/17242.misc
deleted file mode 100644
index 5bd627da57..0000000000
--- a/changelog.d/17242.misc
+++ /dev/null
@@ -1 +0,0 @@
-Clean out invalid destinations from `device_federation_outbox` table.
diff --git a/changelog.d/17246.misc b/changelog.d/17246.misc
deleted file mode 100644
index 9fca36bb29..0000000000
--- a/changelog.d/17246.misc
+++ /dev/null
@@ -1 +0,0 @@
-Fix errors in logs about closing incorrect logging contexts when media gets rejected by a module.
diff --git a/changelog.d/17250.misc b/changelog.d/17250.misc
deleted file mode 100644
index 49834e83ba..0000000000
--- a/changelog.d/17250.misc
+++ /dev/null
@@ -1 +0,0 @@
-Stop logging errors when receiving invalid User IDs in key querys requests.
diff --git a/changelog.d/17251.bugfix b/changelog.d/17251.bugfix
deleted file mode 100644
index f573e01e87..0000000000
--- a/changelog.d/17251.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix reporting of default tags to Sentry, such as worker name. Broke in v1.108.0.
diff --git a/changelog.d/17252.bugfix b/changelog.d/17252.bugfix
deleted file mode 100644
index f3289d1568..0000000000
--- a/changelog.d/17252.bugfix
+++ /dev/null
@@ -1 +0,0 @@
-Fix bug where typing updates would not be sent when using workers after a restart.
diff --git a/debian/changelog b/debian/changelog
index 8491b587e8..927248bdab 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.109.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.109.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Jun 2024 09:42:46 +0100
+
 matrix-synapse-py3 (1.108.0) stable; urgency=medium
 
   * New Synapse release 1.108.0.
diff --git a/pyproject.toml b/pyproject.toml
index 9a3348be49..8cc99b8cba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -96,7 +96,7 @@ module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.108.0"
+version = "1.109.0rc1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later"