diff --git a/ArduPlane/ReleaseNotes.txt b/ArduPlane/ReleaseNotes.txt
index 7e25d03dcb..36af4196f2 100644
--- a/ArduPlane/ReleaseNotes.txt
+++ b/ArduPlane/ReleaseNotes.txt
@@ -1,3 +1,36 @@
+Release 4.2.3 21st August 2022
+------------------------------
+
+This is a minor stable release with a few new features and bug
+fixes. The changes from 4.2.0 are:
+
+- OpenDroneID improvements
+- added --enable-opendroneid configure option
+- added --enable-check-firmware configure option
+- enable OSD menus on KakuteH7
+- added prearm checks for rangefinder pin conflicts
+- added diagnostics for scurve internal error
+- allow absolute paths for linux boards in param defaults
+- fixed AIRBRAKE rc option warning
+- fixed notch filtering ordering issue on loss of RPM source
+- fixed Lutan EFI update serial flood
+- fixed --upload to work on WSL2
+- allow INA2xx battery to init after startup
+- fixed healthy check on battery monitors to check all enabled monitors
+- added Pixhawk6C and Pixhawk6X support
+- fixed alighment of QRTL start in fixed wing circle landing approach
+- added Foxeer Reaper F745 support
+- added MFE PixSurveyA1 support
+- fixed combination of waypoint passby with acceptance distance
+- cut throttle on ICE stop when armed
+- added ICE option for starting when disarmed
+- zero VFWD integrator on ICE override in quadplanes
+- don't failsafe when in fixed wing landing sequence with RTL_AUTOLAND
+- improved handling of overshoot in VTOL landing
+- improved choice of target airspeed in VTOL landing approach
+- improved ICM42xxx filter settings
+- allow for faster sample rates on ICM42xxx
+
 Release 4.2.3beta3 19th August 2022
 -----------------------------------