diff --git a/CHANGES.md b/CHANGES.md
index c1c9c3293d..51c41cddb7 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+# Synapse 1.159.0 (2026-08-18)
+
+No significant changes since 1.159.0rc1.
+
+
 # Synapse 1.159.0rc1 (2026-08-11)
 
 Administrators using the Debian/Ubuntu packages from `packages.matrix.org`, please check
diff --git a/debian/changelog b/debian/changelog
index 53cca6e378..8a6da09864 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.159.0) stable; urgency=medium
+
+  * New synapse release 1.159.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Aug 2026 16:02:56 +0000
+
 matrix-synapse-py3 (1.159.0~rc1) stable; urgency=medium
 
   * New synapse release 1.159.0rc1.
diff --git a/pyproject.toml b/pyproject.toml
index b03bbacd16..8e84e6d37d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "matrix-synapse"
-version = "1.159.0rc1"
+version = "1.159.0"
 description = "Homeserver for the Matrix decentralised comms protocol"
 readme = "README.rst"
 authors = [