diff --git a/ArduSub/version.h b/ArduSub/version.h
index 0f8a20340e..f1994a7ae2 100644
--- a/ArduSub/version.h
+++ b/ArduSub/version.h
@@ -6,12 +6,12 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduSub V4.0.2"
+#define THISFIRMWARE "ArduSub V4.0.3"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,0,2,FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FIRMWARE_VERSION 4,0,3,FIRMWARE_VERSION_TYPE_OFFICIAL
 
 #define FW_MAJOR 4
 #define FW_MINOR 0
-#define FW_PATCH 2
+#define FW_PATCH 3
 #define FW_TYPE FIRMWARE_VERSION_TYPE_OFFICIAL