diff --git a/examples/ECCX08Signing/ECCX08Signing.ino b/examples/ECCX08Signing/ECCX08Signing.ino
index fe92d3e..4f5ba46 100644
--- a/examples/ECCX08Signing/ECCX08Signing.ino
+++ b/examples/ECCX08Signing/ECCX08Signing.ino
@@ -6,7 +6,7 @@
   is printed to the Serial Monitor. Then the signature is
   verified using the public key of the slot.
 
-  NOTE: the input data must be 64 bytes in length!
+  NOTE: the input data must be 32 bytes in length!
 
   Circuit:
    - MKR board with ECC508 or ECC608 on board
@@ -17,11 +17,9 @@
 
 #include <ArduinoECCX08.h>
 
-const byte input[64] = {
+const byte input[32] = {
   0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
-  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
-  0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
-  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f
+  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
 };
 
 const int slot = 0;
@@ -57,7 +55,7 @@ void setup() {
   Serial.print(" is:   ");
   printBufferHex(publicKey, sizeof(publicKey));
 
-  // calculate the signature, input MUST be 64-byte array
+  // calculate the signature, input MUST be 32-byte array
   byte signature[64];
   ECCX08.ecSign(slot, input, signature);