diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index 3dff2553b2..8f842e86fa 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,14 +6,14 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.2.3"
+#define THISFIRMWARE "ZRUAV V5.0.1"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,2,3,FIRMWARE_VERSION_TYPE_OFFICIAL
+#define FIRMWARE_VERSION 5,0,1,FIRMWARE_VERSION_TYPE_OFFICIAL
 
-#define FW_MAJOR 4
-#define FW_MINOR 2
-#define FW_PATCH 3
+#define FW_MAJOR 5
+#define FW_MINOR 0
+#define FW_PATCH 1
 #define FW_TYPE FIRMWARE_VERSION_TYPE_OFFICIAL
 
 #include <AP_Common/AP_FWVersionDefine.h>