diff --git a/ArduPlane/ReleaseNotes.txt b/ArduPlane/ReleaseNotes.txt
index 391183c5bf..58d5df8f91 100644
--- a/ArduPlane/ReleaseNotes.txt
+++ b/ArduPlane/ReleaseNotes.txt
@@ -1,3 +1,22 @@
+Release 5.2.2 5th September 2024
+------------------------------
+This release is purely Ottano-specific bug-fixes and parameter configs. This is
+the first functional release of CxPilot-5.2 for Ottano.
+
+ - Ottano-specific changes:
+   - Copied latest tune from O9
+   - Changed QHover to QLoiter on the Taranis
+   - Fixed logging bug that prevented CHT2 from being logged
+
+Technical:
+ - AP_UAVCAN: upadte_rpm pass error_count [SW-329](https://carbonix.atlassian.net/browse/SW-329)
+ - EFI : correct hirth EFI log messages [SW-310](https://carbonix.atlassian.net/browse/SW-310)
+ - Common Defaults: FLTMODE4 change to QLOITER [SW-263](https://carbonix.atlassian.net/browse/SW-263)
+ - Ottano Defaults: Safety Mask Add Engine (M5) [SW-263](https://carbonix.atlassian.net/browse/SW-263)
+ - Ottano Defaults: Default Enabling INS Logging [SW-263](https://carbonix.atlassian.net/browse/SW-263)
+ - Ottano Defaults: Tuning changes defaulted [SW-263](https://carbonix.atlassian.net/browse/SW-263)
+ - HWDEF : enable APD HVPro Telem for Ottano [SW-339](https://carbonix.atlassian.net/browse/SW-339)
+
 Release 5.2.1 25th July 2024
 ------------------------------
  - Volanti specific changes
diff --git a/libraries/AP_Common/CxVersion.h b/libraries/AP_Common/CxVersion.h
index 737f55f531..2401d98cb9 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-5.2.1"
+#define AP_CUSTOM_FIRMWARE_STRING "CxPilot-5.2.2"
 #endif
 #endif