diff --git a/app/modules/ws2812.c b/app/modules/ws2812.c
index 8e68b100..6875416d 100644
--- a/app/modules/ws2812.c
+++ b/app/modules/ws2812.c
@@ -31,8 +31,8 @@ static void ICACHE_RAM_ATTR ws2812_write(uint8_t pin, uint8_t *pixels, uint32_t
   pixel = *p++;
   mask = 0x80;
   start_time = 0;
-  t0h  = (1000 * system_get_cpu_freq()) / 3333;  // 0.30us (spec=0.35 +- 0.15)
-  t1h  = (1000 * system_get_cpu_freq()) / 1666;  // 0.60us (spec=0.70 +- 0.15)
+  t0h  = (1000 * system_get_cpu_freq()) / 3022;  // 0.35us (spec=0.35 +- 0.15)
+  t1h  = (1000 * system_get_cpu_freq()) / 1477;  // 0.70us (spec=0.70 +- 0.15)
   ttot = (1000 * system_get_cpu_freq()) /  800;  // 1.25us (MUST be >= 1.25)
 
   while (true) {