diff --git a/firmware/main/main.c b/firmware/main/main.c
index a6dd73e..4eed683 100644
--- a/firmware/main/main.c
+++ b/firmware/main/main.c
@@ -15,7 +15,7 @@
 #define LEDC_MODE LEDC_LOW_SPEED_MODE
 #define TIMER LEDC_TIMER_0
 #define BIT_RES LEDC_TIMER_10_BIT
-#define DUTY_50 512
+#define DUTY_50 460
 #define PHASE_180 512
 
 typedef enum {