leaflet .bindLabel using geojson feature

I am new to leaflet and I'd like to add labels to my point map features derived from geojson format.

I am getting the error: TypeError: layer.bindLabel is not a function in this script https://jsfiddle.net/gfiske/ksx600sn/35/ (uncomment line 129)

Can anyone suggest a workaround or a better approach?

thanks.

geojsonLayer = L.geoJson(geojson, {


style: function(feature) {
    return {
      color: feature.properties.GPSUserColor
    };
  },
  pointToLayer: function(feature, latlng) {
    return new L.CircleMarker(latlng, {
      radius: 7,
      fillOpacity: 0.75
    });
  },
  onEachFeature: function(feature, layer) {
    layer.bindPopup(feature.properties.MAP_LABEL);
    layer.bindLabel(feature.properties.MAP_LABEL);
    }
});