diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index 10f1dc442e..57603adb87 100644
--- a/ArduCopter/ArduCopter.pde
+++ b/ArduCopter/ArduCopter.pde
@@ -1,8 +1,8 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
-#define THISFIRMWARE "ArduCopter V2.3"
+#define THISFIRMWARE "ArduCopter V2.3.1"
 /*
-ArduCopter Version 2.3
+ArduCopter Version 2.3.1
 Authors:	Jason Short
 Based on code and ideas from the Arducopter team: Randy Mackay, Pat Hickey, Jose Julio, Jani Hirvinen
 Thanks to:	Chris Anderson, Mike Smith, Jordi Munoz, Doug Weibel, James Goppert, Benjamin Pelletier