diff --git a/ArduPlane/ReleaseNotes.txt b/ArduPlane/ReleaseNotes.txt
index d345da36f7..e015a07e16 100644
--- a/ArduPlane/ReleaseNotes.txt
+++ b/ArduPlane/ReleaseNotes.txt
@@ -1,3 +1,18 @@
+Release 5.2.4 7th October 2024
+------------------------------
+This release includes a patch to fix Ottano default param CAN servo bitmask.
+ - Ottano-specific changes:
+   - CAN Servo Bitmask default fix to Servo 6,9,10 and 11.
+   - Ottano battery monitors configured to new scheme:
+      - 1:Combined VTOL battery monitor
+      - 2:Avionics/Crank battery
+      - 3:Fuel sensor
+      - 4-8: Additional monitors for logging [(more info)](https://carbonix.atlassian.net/wiki/spaces/OTTANO/pages/2651881473)
+
+Technical
+ - Ottano Defaults: set CAN servo bit mask correctly
+ - Ottano Defaults: Battery monitor configuration
+
 Release 5.2.3 2nd October 2024
 ------------------------------
 This release includes a major patch for handling the Ottano engine and the 
diff --git a/libraries/AP_Common/CxVersion.h b/libraries/AP_Common/CxVersion.h
index 8818cdf28b..7aa977a489 100644
--- a/libraries/AP_Common/CxVersion.h
+++ b/libraries/AP_Common/CxVersion.h
@@ -1,5 +1,5 @@
 #ifdef CARBOPILOT
 #ifndef AP_CUSTOM_FIRMWARE_STRING
-#define AP_CUSTOM_FIRMWARE_STRING "CxPilot-5.2.3"
+#define AP_CUSTOM_FIRMWARE_STRING "CxPilot-5.2.4"
 #endif
 #endif