Highcharts X axis adds decimal value when zoom level of browser changes to less than 100%

How do I avoid x axis values to not show decimal values even during zoom level change of the browser. When loaded at 100%, it shows no decimal, but when loaded with a zoom level lesser than it shows decimal values. Tried the below configuration , it doesnt work,

xAxis: {
            allowDecimals: false,
            minTickInterval: 1
       }