diff --git a/README.md b/README.md
index fc05488..afe4c97 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ external-signer-pkcs11 external_public_key --parameter "ewogICJsaWJyYXJ5IjogIi91
 ```
 
 ```shell
-external-signer-pkcs11 external_sign --parameter "ewogICJsaWJyYXJ5IjogIi91c3IvbG9jYWwvbGliL2xpYnlrY3MxMS5keWxpYiIsCiAgInRva2VuX2xhYmVsIjogIll1YmlLZXkgUElWICM1MDEwMjIwIiwKICAicGluIjogIiIsCiAgImtleV9sYWJlbCI6ICJQcml2YXRlIGtleSBmb3IgUElWIEF1dGhlbnRpY2F0aW9uIgp9Cg==" --message-base64 "$(echo aaaa |base64)" --alg ES256
+external-signer-pkcs11 external_sign --parameter "ewogICJsaWJyYXJ5IjogIi91c3IvbG9jYWwvbGliL2xpYnlrY3MxMS5keWxpYiIsCiAgInRva2VuX2xhYmVsIjogIll1YmlLZXkgUElWICM1MDEwMjIwIiwKICAicGluIjogIiIsCiAgImtleV9sYWJlbCI6ICJQcml2YXRlIGtleSBmb3IgUElWIEF1dGhlbnRpY2F0aW9uIgp9Cg==" --message-base64 "$(echo aaaa |base64)" --alg ES384
 ```
 
 ```json