my $loader = sub {
            my $slurp = '';

            {
                local $/ = undef;
                open my $config, '<', $self->configfile;
                $slurp = <$config>;
                close $config;
            }

            return $slurp;
        };

        # try json
        try {
            my $json = JSON->new;
            $self->config( $json->decode( $loader->() ));
        }
        # try yaml
        catch {
            $self->config( Load $loader->() );
        }