diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index f83b62c252..7993c32aa5 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,7 +6,7 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.2.3-rc1"
+#define THISFIRMWARE "ArduCopter V4.2.3-rc2"
 
 // the following line is parsed by the autotest scripts
 #define FIRMWARE_VERSION 4,2,3,FIRMWARE_VERSION_TYPE_RC