diff --git a/Tools/AP_Periph/ReleaseNotes.txt b/Tools/AP_Periph/ReleaseNotes.txt
index ab4c6b38fb..d54f1f84d3 100644
--- a/Tools/AP_Periph/ReleaseNotes.txt
+++ b/Tools/AP_Periph/ReleaseNotes.txt
@@ -1,9 +1,10 @@
-Release 1.3.1 15th Apr 2022
+Release 1.3.1 18th Apr 2022
 ---------------------------
 
-This is a minor release with a single bug fix:
+This is a minor release with two changes:
 
  - fixed intermittent loss of GPS packets on F4 and L4 GPS nodes which caused loss of GPS lock on the flight controller
+ - add support for the MatekL431-Rangefinder target
 
 Release 1.3.0 18th Mar 2022
 ---------------------------