diff --git a/changelogs/appendices/newsfragments/1627.clarification b/changelogs/appendices/newsfragments/1627.clarification
deleted file mode 100644
index 44775447..00000000
--- a/changelogs/appendices/newsfragments/1627.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Clarify timestamp specification with respect to leap seconds.
diff --git a/changelogs/appendices/newsfragments/1652.clarification b/changelogs/appendices/newsfragments/1652.clarification
deleted file mode 100644
index 3ccb2333..00000000
--- a/changelogs/appendices/newsfragments/1652.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix various typos throughout the specification.
diff --git a/changelogs/client_server/newsfragments/1546.clarification b/changelogs/client_server/newsfragments/1546.clarification
deleted file mode 100644
index d73f43f5..00000000
--- a/changelogs/client_server/newsfragments/1546.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix `m.call.negotiate` schema and example.
diff --git a/changelogs/client_server/newsfragments/1617.feature b/changelogs/client_server/newsfragments/1617.feature
deleted file mode 100644
index 353987ad..00000000
--- a/changelogs/client_server/newsfragments/1617.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add the `m.rule.suppress_edits` default push rule, as per [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958).
diff --git a/changelogs/client_server/newsfragments/1618.clarification b/changelogs/client_server/newsfragments/1618.clarification
deleted file mode 100644
index cd043f0d..00000000
--- a/changelogs/client_server/newsfragments/1618.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Clarify that the `via` property is required for `m.space.parent` and `m.space.child` as per [MSC1772](https://github.com/matrix-org/matrix-spec-proposals/pull/1772). Contributed by @PaarthShah.
diff --git a/changelogs/client_server/newsfragments/1638.clarification b/changelogs/client_server/newsfragments/1638.clarification
deleted file mode 100644
index a90cc4dd..00000000
--- a/changelogs/client_server/newsfragments/1638.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Add a note to the `/publicRooms` API that the server name is case sensitive. 
diff --git a/changelogs/client_server/newsfragments/1639.clarification b/changelogs/client_server/newsfragments/1639.clarification
deleted file mode 100644
index 781cc2ca..00000000
--- a/changelogs/client_server/newsfragments/1639.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Clarify that an `m.room.name` event with an absent `name` field is not expected behavior.
\ No newline at end of file
diff --git a/changelogs/client_server/newsfragments/1647.clarification b/changelogs/client_server/newsfragments/1647.clarification
deleted file mode 100644
index d7c9a685..00000000
--- a/changelogs/client_server/newsfragments/1647.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix schemas used for account data and presence events in `GET /initialSync`.
diff --git a/changelogs/client_server/newsfragments/1658.clarification b/changelogs/client_server/newsfragments/1658.clarification
deleted file mode 100644
index 3ccb2333..00000000
--- a/changelogs/client_server/newsfragments/1658.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix various typos throughout the specification.
diff --git a/changelogs/client_server/newsfragments/1661.clarification b/changelogs/client_server/newsfragments/1661.clarification
deleted file mode 100644
index 3ccb2333..00000000
--- a/changelogs/client_server/newsfragments/1661.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix various typos throughout the specification.
diff --git a/changelogs/client_server/newsfragments/1665.clarification b/changelogs/client_server/newsfragments/1665.clarification
deleted file mode 100644
index 3ccb2333..00000000
--- a/changelogs/client_server/newsfragments/1665.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix various typos throughout the specification.
diff --git a/changelogs/client_server/newsfragments/1671.clarification b/changelogs/client_server/newsfragments/1671.clarification
deleted file mode 100644
index eade49a7..00000000
--- a/changelogs/client_server/newsfragments/1671.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix `.m.rule.suppress_notices` push rule not being valid JSON.
diff --git a/changelogs/client_server/newsfragments/1673.clarification b/changelogs/client_server/newsfragments/1673.clarification
deleted file mode 100644
index 8ab3da4d..00000000
--- a/changelogs/client_server/newsfragments/1673.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Add missing properties for `event_property_is` and `event_property_contains` push conditions to `PushConditions` object.
diff --git a/changelogs/client_server/newsfragments/1676.clarification b/changelogs/client_server/newsfragments/1676.clarification
deleted file mode 100644
index 79275096..00000000
--- a/changelogs/client_server/newsfragments/1676.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Indicate that fallback keys should have a `fallback` property set to `true`.
diff --git a/changelogs/client_server/newsfragments/1677.clarification b/changelogs/client_server/newsfragments/1677.clarification
deleted file mode 100644
index 56c89af8..00000000
--- a/changelogs/client_server/newsfragments/1677.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Clarify that thread roots are not considered within the thread.
diff --git a/changelogs/internal/newsfragments/1633.clarification b/changelogs/internal/newsfragments/1633.clarification
deleted file mode 100644
index 64988279..00000000
--- a/changelogs/internal/newsfragments/1633.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Replace all mentions of Swagger by OpenAPI.
diff --git a/changelogs/internal/newsfragments/1634.clarification b/changelogs/internal/newsfragments/1634.clarification
deleted file mode 100644
index b4d1ce39..00000000
--- a/changelogs/internal/newsfragments/1634.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix enum types in JSON schemas.
diff --git a/changelogs/internal/newsfragments/1635.clarification b/changelogs/internal/newsfragments/1635.clarification
deleted file mode 100644
index a5bd245c..00000000
--- a/changelogs/internal/newsfragments/1635.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix schema of `m.mentions` object.
diff --git a/changelogs/internal/newsfragments/1637.clarification b/changelogs/internal/newsfragments/1637.clarification
deleted file mode 100644
index 018cd98f..00000000
--- a/changelogs/internal/newsfragments/1637.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix rendering of `m.receipt` event in Client-Server API.
diff --git a/changelogs/internal/newsfragments/1646.clarification b/changelogs/internal/newsfragments/1646.clarification
deleted file mode 100644
index 41e73c34..00000000
--- a/changelogs/internal/newsfragments/1646.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Remove required `fieldname` in appservice Protocol definition.
\ No newline at end of file
diff --git a/changelogs/internal/newsfragments/1648.clarification b/changelogs/internal/newsfragments/1648.clarification
deleted file mode 100644
index 68bbd683..00000000
--- a/changelogs/internal/newsfragments/1648.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix github action workflow responsible for releasing of @matrix-org/spec package.
diff --git a/changelogs/internal/newsfragments/1656.feature b/changelogs/internal/newsfragments/1656.feature
deleted file mode 100644
index 3d6fda19..00000000
--- a/changelogs/internal/newsfragments/1656.feature
+++ /dev/null
@@ -1 +0,0 @@
-Add more CI checks for OpenAPI definitions and JSON Schemas.
diff --git a/changelogs/internal/newsfragments/1657.feature b/changelogs/internal/newsfragments/1657.feature
deleted file mode 100644
index c5d8155d..00000000
--- a/changelogs/internal/newsfragments/1657.feature
+++ /dev/null
@@ -1 +0,0 @@
-Generate server-server OpenAPI definition.
diff --git a/changelogs/internal/newsfragments/1660.clarification b/changelogs/internal/newsfragments/1660.clarification
deleted file mode 100644
index 3e7c7e94..00000000
--- a/changelogs/internal/newsfragments/1660.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Upgrade GitHub actions.
diff --git a/changelogs/server_server/newsfragments/1636.clarification b/changelogs/server_server/newsfragments/1636.clarification
deleted file mode 100644
index 9f39a014..00000000
--- a/changelogs/server_server/newsfragments/1636.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix schema of `m.receipt` EDU.
diff --git a/changelogs/server_server/newsfragments/1661.clarification b/changelogs/server_server/newsfragments/1661.clarification
deleted file mode 100644
index 3ccb2333..00000000
--- a/changelogs/server_server/newsfragments/1661.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Fix various typos throughout the specification.
diff --git a/changelogs/server_server/newsfragments/1672.clarification b/changelogs/server_server/newsfragments/1672.clarification
deleted file mode 100644
index d664c0b3..00000000
--- a/changelogs/server_server/newsfragments/1672.clarification
+++ /dev/null
@@ -1 +0,0 @@
-Clarify that federation requests for non-local users are invalid.
diff --git a/config.toml b/config.toml
index 9377b1f3..ac5dae65 100644
--- a/config.toml
+++ b/config.toml
@@ -47,14 +47,14 @@ privacy_policy = "https://matrix.org/legal/privacy-notice"
 [params.version]
 # must be one of "unstable", "current", "historical"
 # this is used to decide whether to show a banner pointing to the current release
-status = "unstable"
+status = "stable"
 # A URL pointing to the latest, stable release of the spec. To be shown in the unstable version warning banner.
 current_version_url = "https://spec.matrix.org/latest"
 # The following is used when status = "stable", and is displayed in various UI elements on a released version
 # of the spec. CI will set these values here automatically when a release git tag (i.e `v1.5`) is created.
-# major = "1"
-# minor = "8"
-# release_date = "August 23, 2023"
+major = "1"
+minor = "9"
+release_date = "November 29, 2023"
 
 # User interface configuration
 [params.ui]
diff --git a/content/changelog/v1.9.md b/content/changelog/v1.9.md
new file mode 100644
index 00000000..46a79f37
--- /dev/null
+++ b/content/changelog/v1.9.md
@@ -0,0 +1,93 @@
+---
+date: 2023-11-29T10:04:26-07:00
+---
+<!--
+This is a header file for the generated changelog.
+
+Variables:
+    v1.9  = Replaced by the version number (eg: v1.2)
+    November 29, 2023     = Replaced by the date (eg: April 01, 2021)
+-->
+
+## v1.9
+
+<table class="release-info">
+<tr><th>Git commit</th><td><a href="https://github.com/matrix-org/matrix-spec/tree/v1.9">https://github.com/matrix-org/matrix-spec/tree/v1.9</a></td>
+<tr><th>Release date</th><td>November 29, 2023</td>
+</table>
+
+<!-- Intentionally blank line to ensure headers work in the concatenated changelog -->
+
+### Client-Server API
+
+**Backwards Compatible Changes**
+
+- Add the `m.rule.suppress_edits` default push rule, as per [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958). ([#1617](https://github.com/matrix-org/matrix-spec/issues/1617))
+
+**Spec Clarifications**
+
+- Fix `m.call.negotiate` schema and example. ([#1546](https://github.com/matrix-org/matrix-spec/issues/1546))
+- Clarify that the `via` property is required for `m.space.parent` and `m.space.child` as per [MSC1772](https://github.com/matrix-org/matrix-spec-proposals/pull/1772). Contributed by @PaarthShah. ([#1618](https://github.com/matrix-org/matrix-spec/issues/1618))
+- Add a note to the `/publicRooms` API that the server name is case sensitive. ([#1638](https://github.com/matrix-org/matrix-spec/issues/1638))
+- Clarify that an `m.room.name` event with an absent `name` field is not expected behavior. ([#1639](https://github.com/matrix-org/matrix-spec/issues/1639))
+- Fix schemas used for account data and presence events in `GET /initialSync`. ([#1647](https://github.com/matrix-org/matrix-spec/issues/1647))
+- Fix various typos throughout the specification. ([#1658](https://github.com/matrix-org/matrix-spec/issues/1658), [#1661](https://github.com/matrix-org/matrix-spec/issues/1661), [#1665](https://github.com/matrix-org/matrix-spec/issues/1665))
+- Fix `.m.rule.suppress_notices` push rule not being valid JSON. ([#1671](https://github.com/matrix-org/matrix-spec/issues/1671))
+- Add missing properties for `event_property_is` and `event_property_contains` push conditions to `PushConditions` object. ([#1673](https://github.com/matrix-org/matrix-spec/issues/1673))
+- Indicate that fallback keys should have a `fallback` property set to `true`. ([#1676](https://github.com/matrix-org/matrix-spec/issues/1676))
+- Clarify that thread roots are not considered within the thread. ([#1677](https://github.com/matrix-org/matrix-spec/issues/1677))
+
+
+### Server-Server API
+
+**Spec Clarifications**
+
+- Fix schema of `m.receipt` EDU. ([#1636](https://github.com/matrix-org/matrix-spec/issues/1636))
+- Fix various typos throughout the specification. ([#1661](https://github.com/matrix-org/matrix-spec/issues/1661))
+- Clarify that federation requests for non-local users are invalid. ([#1672](https://github.com/matrix-org/matrix-spec/issues/1672))
+
+
+### Application Service API
+
+No significant changes.
+
+
+### Identity Service API
+
+No significant changes.
+
+
+### Push Gateway API
+
+No significant changes.
+
+
+### Room Versions
+
+No significant changes.
+
+
+### Appendices
+
+**Spec Clarifications**
+
+- Clarify timestamp specification with respect to leap seconds. ([#1627](https://github.com/matrix-org/matrix-spec/issues/1627))
+- Fix various typos throughout the specification. ([#1652](https://github.com/matrix-org/matrix-spec/issues/1652))
+
+
+### Internal Changes/Tooling
+
+**Backwards Compatible Changes**
+
+- Add more CI checks for OpenAPI definitions and JSON Schemas. ([#1656](https://github.com/matrix-org/matrix-spec/issues/1656))
+- Generate server-server OpenAPI definition. ([#1657](https://github.com/matrix-org/matrix-spec/issues/1657))
+
+**Spec Clarifications**
+
+- Replace all mentions of Swagger by OpenAPI. ([#1633](https://github.com/matrix-org/matrix-spec/issues/1633))
+- Fix enum types in JSON schemas. ([#1634](https://github.com/matrix-org/matrix-spec/issues/1634))
+- Fix schema of `m.mentions` object. ([#1635](https://github.com/matrix-org/matrix-spec/issues/1635))
+- Fix rendering of `m.receipt` event in Client-Server API. ([#1637](https://github.com/matrix-org/matrix-spec/issues/1637))
+- Remove required `fieldname` in appservice Protocol definition. ([#1646](https://github.com/matrix-org/matrix-spec/issues/1646))
+- Fix github action workflow responsible for releasing of @matrix-org/spec package. ([#1648](https://github.com/matrix-org/matrix-spec/issues/1648))
+- Upgrade GitHub actions. ([#1660](https://github.com/matrix-org/matrix-spec/issues/1660))