1.21.0rc3

1 files changed, 15 insertions, 0 deletions

diff --git a/CHANGES.md b/CHANGES.md

index 5d4e80499e..5d977d2aad 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,18 @@
+Synapse 1.21.0rc3 (2020-10-08)
+==============================
+
+Bugfixes
+--------
+
+- Fix duplication of events on high traffic servers, caused by PostgresQL `could not serialize access due to concurrent update` errors. ([\#8456](https://github.com/matrix-org/synapse/issues/8456))
+
+
+Internal Changes
+----------------
+
+- Add Groovy Gorilla to the list of distributions we build `.deb`s for. ([\#8475](https://github.com/matrix-org/synapse/issues/8475))
+
+
 Synapse 1.21.0rc2 (2020-10-02)
 ==============================