diff --git a/examples/nfc-mfclassic.c b/examples/nfc-mfclassic.c
index d3460e8..3731c25 100644
--- a/examples/nfc-mfclassic.c
+++ b/examples/nfc-mfclassic.c
@@ -57,7 +57,7 @@ static byte_t keys[] = {
   0x1a, 0x98, 0x2c, 0x7e, 0x45, 0x9a,
   0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-  0xab, 0xcd, 0xef, 0x12, 0x34, 0x45
+  0xab, 0xcd, 0xef, 0x12, 0x34, 0x56
 };
 
 static size_t num_keys = sizeof (keys) / 6;