diff --git a/mapboxgl/templates/main.html b/mapboxgl/templates/main.html
index 29e1c4c..08a5380 100644
--- a/mapboxgl/templates/main.html
+++ b/mapboxgl/templates/main.html
@@ -90,10 +90,10 @@
         expression = ['interpolate', ['exponential', 1.2], ['zoom']]
     }
     else if (propertyValue == 'heatmap-density') {
-        expression = ['interpolate', ['exponential', 1.2], ['heatmap-density']]
+        expression = ['interpolate', ['linear'], ['heatmap-density']]
     }
     else {
-        expression = ['interpolate', ['exponential', 1.2], ['get', propertyValue]]
+        expression = ['interpolate', ['linear'], ['get', propertyValue]]
     }
 
     for (var i=0; i<stops.length; i++) {