diff --git a/README b/README
index 6771933..b1dfafa 100644
--- a/README
+++ b/README
@@ -142,7 +142,7 @@ EVM encrypted key is used for EVM HMAC calculation:
     keyctl pipe `keyctl search @u user kmk` > /etc/keys/kmk
 
     # create the EVM encrypted key
-    keyctl add encrypted evm-key "new user:kmk 32" @u
+    keyctl add encrypted evm-key "new user:kmk 64" @u
     keyctl pipe `keyctl search @u encrypted evm-key` >/etc/keys/evm-key