diff --git a/README.md b/README.md
index b77baa6..093dea3 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ I have included a conversion of the test file `0xcafec0de.txt` included in the C
 
 `libnfc_crypto1_crack` uses libnfc to demonstrate the CraptEV1 code using the bitsliced cracker
 
-    $ ./libnfc_crypto1_crack 000000000000 0 A 5 A
+    $ ./libnfc_crypto1_crack 000000000000 0 A 4 A
 
 
 Acknowledgements