diff --git a/Rover/version.h b/Rover/version.h
index ee7082a2f0..2d4db998f9 100644
--- a/Rover/version.h
+++ b/Rover/version.h
@@ -6,14 +6,14 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduRover V4.5.4"
+#define THISFIRMWARE "ArduRover V4.5.5-beta1"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,5,4,FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FIRMWARE_VERSION 4,5,5,FIRMWARE_VERSION_TYPE_BETA
 
 #define FW_MAJOR 4
 #define FW_MINOR 5
-#define FW_PATCH 4
-#define FW_TYPE FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FW_PATCH 5
+#define FW_TYPE FIRMWARE_VERSION_TYPE_BETA
 
 #include <AP_Common/AP_FWVersionDefine.h>