diff --git a/CHANGES.md b/CHANGES.md
index f9659d596d..a1fc8675ec 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,9 @@
+Synapse 1.42.0 (2021-09-07)
+===========================
+
+No significant changes.
+
+
 Synapse 1.42.0rc2 (2021-09-06)
 ==============================
 
diff --git a/debian/changelog b/debian/changelog
index e865e0d2f6..4a37174a94 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.42.0) stable; urgency=medium
+
+  * New synapse release 1.42.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 07 Sep 2021 16:19:09 +0100
+
 matrix-synapse-py3 (1.42.0~rc2) stable; urgency=medium
 
   * New synapse release 1.42.0~rc2.
diff --git a/synapse/__init__.py b/synapse/__init__.py
index e4302d81a8..dc7ae24295 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -47,7 +47,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.42.0rc2"
+__version__ = "1.42.0"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when