diff --git a/app/gui/oven_control/define.h b/app/gui/oven_control/define.h
index 1d50ca0..2a88a67 100644
--- a/app/gui/oven_control/define.h
+++ b/app/gui/oven_control/define.h
@@ -5,7 +5,7 @@
 
 #define MAJOR_VER   2
 #define MINOR_VER   0
-#define HOTFIX_VER  3
+#define HOTFIX_VER  4
 
 // 0 for normal
 // 1 for premium