diff --git a/NodeManager.h b/NodeManager.h
index 6e3ed5ede457fd7a3559fa6892421fe600e5916d..6bf3edd598dea61311d8d1aa763df951934fe009 100644
--- a/NodeManager.h
+++ b/NodeManager.h
@@ -7,7 +7,7 @@
 #include <Arduino.h>
 
 // define NodeManager version
-#define VERSION "1.5"
+#define VERSION "1.6-dev"
 
 /***********************************
    Constants