ApexChart Heatmap fit text

Question

I have a ApexChart Heatmap but the labels in my heatmap-box are to big.

Is there any possibility to make the box fit to my text?

This is the code of my dataLabels properti:

dataLabels: {
        formatter: function (val, opts) {
            return [
                opts.w.config.series[opts.seriesIndex].data[opts.dataPointIndex].z,  
                '#' + opts.w.config.series[opts.seriesIndex].data[opts.dataPointIndex].a + 
                ' Ø' + opts.w.config.series[opts.seriesIndex].data[opts.dataPointIndex].b,
                'Min ' + opts.w.config.series[opts.seriesIndex].data[opts.dataPointIndex].c +
                ' Max ' + opts.w.config.series[opts.seriesIndex].data[opts.dataPointIndex].d,
            ];
        },
        offsetY: -15,
        style: {
            fontSize: "8px",
          },
    },