diff --git a/App/driver/backlight.c b/App/driver/backlight.c
index ce3f20c2..2614f550 100644
--- a/App/driver/backlight.c
+++ b/App/driver/backlight.c
@@ -31,7 +31,7 @@
     #include "misc.h"
 #endif
 
-#define PWM_FREQ 320
+#define PWM_FREQ 4000
 #define DUTY_CYCLE_LEVELS 64
 
 #define DUTY_CYCLE_ON_VALUE GPIO_PIN_MASK(GPIO_PIN_BACKLIGHT)