diff --git a/ArduPlane/version.h b/ArduPlane/version.h
index e749abdd77..5f39c45d0f 100644
--- a/ArduPlane/version.h
+++ b/ArduPlane/version.h
@@ -6,14 +6,14 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduPlane V4.5.5"
+#define THISFIRMWARE "ArduPlane V4.5.6-beta1"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,5,5,FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FIRMWARE_VERSION 4,5,6,FIRMWARE_VERSION_TYPE_BETA
 
 #define FW_MAJOR 4
 #define FW_MINOR 5
-#define FW_PATCH 5
-#define FW_TYPE FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FW_PATCH 6
+#define FW_TYPE FIRMWARE_VERSION_TYPE_BETA
 
 #include <AP_Common/AP_FWVersionDefine.h>