diff --git a/src/main.cpp b/src/main.cpp
index 47f0989..371dfe0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -8,7 +8,7 @@
  */
 #include "Arduino.h"
 
-#define LED_PIN 6
+#define LED_PIN 21
 
 void setup()
 {