diff --git a/app/Kconfig b/app/Kconfig
index fde08909..2fc8c45d 100644
--- a/app/Kconfig
+++ b/app/Kconfig
@@ -323,7 +323,7 @@ config ZMK_RGB_UNDERGLOW_SPD_START
 
 config ZMK_RGB_UNDERGLOW_EFF_START
     int "RGB underglow start effect int value related to the effect enum list"
-    range 0 3
+    range 0 4
 
 config ZMK_RGB_UNDERGLOW_ON_START
     bool "RGB underglow starts on by default"