diff --git a/README.md b/README.md
index 0ab1546..e21e533 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,14 @@ Read a card using a mfrc522 reader on your SPI interface on your Arduino
 * Pin layout should be as follows (on Arduino Uno):
 * MOSI: Pin 11 / ICSP-4
 * MISO: Pin 12 / ICSP-1
-* SCK: Pin 13 / ISCP-3
-* SS: Pin 10 (Configurable)
-* RST: Pin 9 (Configurable)
+* SCK : Pin 13 / ISCP-3
+* SS  : Pin 10 (Configurable)
+* RST : Pin 9  (Configurable)
+* 
+
+* Pin layout should be as follows (on Arduino Mega):
+* MOSI: Pin 51 / ICSP-4
+* MISO: Pin 50 / ICSP-1
+* SCK : Pin 52 / ISCP-3
+* SS  : Pin 53 (Configurable)
+* RST : Pin 5  (Configurable)