Briefcase CLI giving error

Hi,

I am getting following error from briefcase CLI while trying to pull data from aggregate:

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/opendatakit/briefcase/Launcher : Unsupported major.minor version 52.0

Briefcase version 1.17.4
ODK aggregate version 1.4.4

Please help about what is wrong and how to fix.

Thanks,
Saad