diff --git a/ArduPlane/version.h b/ArduPlane/version.h
index ead1f4b9a5..8cb9ae50b4 100644
--- a/ArduPlane/version.h
+++ b/ArduPlane/version.h
@@ -6,13 +6,13 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduPlane V4.2.0dev"
+#define THISFIRMWARE "ArduPlane V4.3.0dev"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,2,0,FIRMWARE_VERSION_TYPE_DEV
+#define FIRMWARE_VERSION 4,3,0,FIRMWARE_VERSION_TYPE_DEV
 
 #define FW_MAJOR 4
-#define FW_MINOR 2
+#define FW_MINOR 3
 #define FW_PATCH 0
 #define FW_TYPE FIRMWARE_VERSION_TYPE_DEV