diff --git a/board/scarlet/board.h b/board/scarlet/board.h
index 1ebd1e7eb2..a6f152840f 100644
--- a/board/scarlet/board.h
+++ b/board/scarlet/board.h
@@ -134,7 +134,7 @@
 #define PD_OPERATING_POWER_MW 15000
 #define PD_MAX_POWER_MW       ((PD_MAX_VOLTAGE_MV * PD_MAX_CURRENT_MA) / 1000)
 #define PD_MAX_CURRENT_MA     3000
-#define PD_MAX_VOLTAGE_MV     9500
+#define PD_MAX_VOLTAGE_MV     5500
 
 #define PD_POWER_SUPPLY_TURN_ON_DELAY  30000  /* us */
 #define PD_POWER_SUPPLY_TURN_OFF_DELAY 50000  /* us */