diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index 7853091cac..570d0e1ca4 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,10 +6,10 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.2.0-rc1"
+#define THISFIRMWARE "ArduCopter V4.2.0-rc2"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,2,0,FIRMWARE_VERSION_TYPE_RC+1
+#define FIRMWARE_VERSION 4,2,0,FIRMWARE_VERSION_TYPE_RC+2
 
 #define FW_MAJOR 4
 #define FW_MINOR 2