diff --git a/main.cpp b/main.cpp
index d69b346..96ffddf 100644
--- a/main.cpp
+++ b/main.cpp
@@ -12,7 +12,7 @@
 #include "serial_io.h"
 #include "Socket.h"
 
-#define VERSION "v0.3"
+#define VERSION "v0.4"
 
 bool stop = false;