diff --git a/CHANGELOG b/CHANGELOG
index 69fdaad..beaff61 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -142,3 +142,9 @@
 * Add support for generating thumbnails for WebP images. Previously, users would see an empty box instead of preview image. Contributed by @WGH-. (#7586)
 * Support the standardized m.login.sso user-interactive authentication flow. (#7630)
 
+[1.5.0]
+* Update Synapse to 1.15.2
+* [Full changelog](https://github.com/matrix-org/synapse/releases/tag/v1.15.2)
+* A malicious homeserver could force Synapse to reset the state in a room to a small subset of the correct state. This affects all Synapse deployments which federate with untrusted servers. (96e9afe6)
+* HTML pages served via Synapse were vulnerable to clickjacking attacks. This predominantly affects homeservers with single-sign-on enabled, but all server administrators are encouraged to upgrade. (ea26e9a9)
+
diff --git a/CloudronManifest.json b/CloudronManifest.json
index f3b94d2..2f569ee 100644
--- a/CloudronManifest.json
+++ b/CloudronManifest.json
@@ -5,7 +5,7 @@
   "description": "file://DESCRIPTION.md",
   "changelog": "file://CHANGELOG",
   "tagline": "Secure & decentralized communication",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "healthCheckPath": "/",
   "httpPort": 8008,
   "memoryLimit": 536870912,
diff --git a/DESCRIPTION.md b/DESCRIPTION.md
index 3138db8..d045828 100644
--- a/DESCRIPTION.md
+++ b/DESCRIPTION.md
@@ -1,4 +1,4 @@
-This app packages Synapse <upstream>1.15.1</upstream>.
+This app packages Synapse <upstream>1.15.2</upstream>.
 
 **This package only provides the Matrix backend. A variety of clients are available
 [here](https://matrix.org/clients/). Riot is a popular web frontend for Matrix and