diff --git a/ArduSub/version.h b/ArduSub/version.h
index 336c2815e50a8..edc0a4ad49de2 100644
--- a/ArduSub/version.h
+++ b/ArduSub/version.h
@@ -6,13 +6,13 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduSub V4.5.0-dev"
+#define THISFIRMWARE "ArduSub V4.6.0-dev"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,5,0,FIRMWARE_VERSION_TYPE_DEV
+#define FIRMWARE_VERSION 4,6,0,FIRMWARE_VERSION_TYPE_DEV
 
 #define FW_MAJOR 4
-#define FW_MINOR 5
+#define FW_MINOR 6
 #define FW_PATCH 0
 #define FW_TYPE FIRMWARE_VERSION_TYPE_DEV