diff --git a/README.md b/README.md
index 6e158aaacb94687f75dc216637d7f4e50caa981f..a44819d1adc78677bae7fba413f0b05dd7f844b6 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,8 @@ I encrypt the `keyring-name : password` pair with GnuPG and save it as `secret-f
 
 ## Usage
 
+> I recommend you to **configure Yubikey as GPG smartcard**. The system would just ask you to unlock gnome-keyring with your default GPG software. You may generate a new GPG key for yubikey, or move your existing GPG key into yubikey. Refer to google for yubikey-GPG. 
+
 First, build the project from source.
 ```
 git clone https://github.com/recolic/gnome-keyring-yubikey-unlock --recursive