diff --git a/CHANGES.md b/CHANGES.md
index 6cdddec5dd..80df04de4c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,10 @@
+# Synapse 1.164.0 (2026-10-27)
+
+No significant changes since 1.164.0rc3.
+
+
+
+
 # Synapse 1.164.0rc3 (2026-10-23)
 
 ## Internal Changes
diff --git a/debian/changelog b/debian/changelog
index fe846517f0..092c06adba 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.164.0) stable; urgency=medium
+
+  * New synapse release 1.164.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 27 Oct 2026 16:03:16 +0000
+
 matrix-synapse-py3 (1.164.0~rc3) stable; urgency=medium
 
   * New synapse release 1.164.0rc3.
diff --git a/pyproject.toml b/pyproject.toml
index 77c9ceeaec..80467567b8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "matrix-synapse"
-version = "1.164.0rc3"
+version = "1.164.0"
 description = "Homeserver for the Matrix decentralised comms protocol"
 readme = "README.rst"
 authors = [