SHA1 certificate when signing app

[anon(9755546)]

Hi,

I'm not an expert at these but I'm just following the code

keytool -genkey -v -keystore orbii.jks
-keyalg RSA -keysize 2048 -validity 10000 -alias orbii

for signing a keystore. However, I end up getting a SHA1 certificate for the keytool? I have the latest version of Android SDK and I need a SHA256 certificate in order to be able to use the Amazon Gamecircle feature. How can I create a keystore with a SHA256 certificate instead of SHA1? Thanks!