diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index 35ee178e09..aca789abdc 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,13 +6,13 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.4.0-dev"
+#define THISFIRMWARE "ArduCopter V4.5.0-dev"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,4,0,FIRMWARE_VERSION_TYPE_DEV
+#define FIRMWARE_VERSION 4,5,0,FIRMWARE_VERSION_TYPE_DEV
 
 #define FW_MAJOR 4
-#define FW_MINOR 4
+#define FW_MINOR 5
 #define FW_PATCH 0
 #define FW_TYPE FIRMWARE_VERSION_TYPE_DEV