diff --git a/Software/Software.cpp b/Software/Software.cpp
index 96ee0487..387a5dbe 100644
--- a/Software/Software.cpp
+++ b/Software/Software.cpp
@@ -34,7 +34,7 @@
 #endif
 
 // The current software version, shown on webserver
-const char* version_number = "9.1.0";
+const char* version_number = "9.1.dev";
 
 // Interval timers
 volatile unsigned long currentMillis = 0;