diff --git a/ArduCopter/ReleaseNotes.txt b/ArduCopter/ReleaseNotes.txt
index 3419463228..88c14a75e3 100644
--- a/ArduCopter/ReleaseNotes.txt
+++ b/ArduCopter/ReleaseNotes.txt
@@ -1,6 +1,6 @@
 ArduPilot Copter Release Notes:
 ------------------------------------------------------------------
-Copter 3.5.3-rc1 12-Sep-2017
+Copter 3.5.3 21-Sep-2017 / Copter 3.5.3-rc1 12-Sep-2017
 Changes from 3.5.2
 1) Guided mode support yaw and yaw-rate fields from set-position-target message
 2) Optical Flow startup retries 10 times