diff --git a/types/highcharts/index.d.ts b/types/highcharts/index.d.ts
index 51028bd6af..2c4b14c797 100644
--- a/types/highcharts/index.d.ts
+++ b/types/highcharts/index.d.ts
@@ -4,6 +4,7 @@
 //                 Dan Lewi Harkestad <https://github.com/baltie>
 //                 Albert Ozimek <https://github.com/AlbertOzimek>
 //                 Juliën Hanssens <https://github.com/hanssens>
+//                 Johns Gresham <https://github.com/jgresham>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -6018,7 +6019,11 @@ declare namespace Highcharts {
          * The id of a series in the drilldown.series array to use for a drilldown for this point.
          * @since 3.0.8
          */
-        drilldown?: string;
+				drilldown?: string;
+				/**
+				 * The end value of the point. For gantt datetime axes, the end value is the timestamp in milliseconds since 1970.
+				 */
+				end?: number;
         /**
          * Individual point events
          */
@@ -6097,7 +6102,11 @@ declare namespace Highcharts {
          * Whether to display a slice offset from the center.
          * @default false
          */
-        sliced?: boolean;
+				sliced?: boolean;
+				/**
+				 * The start value of the point. For gantt datetime axes, the start value is the timestamp in milliseconds since 1970.
+				 */
+				start?: number;
         /**
          * The value of the point, resulting in a relative area of the point in the treemap.
          */
@@ -7256,7 +7265,11 @@ declare namespace Highcharts {
          * As Highcharts.Chart, but without need for the new keyword.
          * @since 4.2.0
          */
-        chart(renderTo: string | HTMLElement, options: Options, callback?: (chart: ChartObject) => void): ChartObject;
+				chart(renderTo: string | HTMLElement, options: Options, callback?: (chart: ChartObject) => void): ChartObject;
+				/**
+				 * Highcharts ganttChart which doesn't require the new keyword. Required Highcharts Gantt module.
+				 */
+				ganttChart(renderTo: string | HTMLElement, options: Options, callback?: (chart: ChartObject) => void): ChartObject;
         /**
          * An array containing the current chart objects in the page. A chart's position in the array is preserved
          * throughout the page's lifetime. When a chart is destroyed, the array item becomes undefined.
diff --git a/types/highcharts/test/index.ts b/types/highcharts/test/index.ts
index 1474ee7e9c..9ac03d1f81 100644
--- a/types/highcharts/test/index.ts
+++ b/types/highcharts/test/index.ts
@@ -2856,3 +2856,33 @@ function test_WrapTooltipBehavior() {
         // Many prototype functions use this so arrow functions should only be used to replace behaviors.
     });
 }
+
+// Tests Highcharts.ganttChart, which usings the Gantt module
+function test_GanttChart() {
+	Highcharts.ganttChart('ganttChartContainer', {
+		xAxis: {
+			min: Date.UTC(2014, 9, 18),
+			max: Date.UTC(2014, 12, 20)
+		},
+		series: [{
+			name: 'Project 1',
+			data: [
+				{
+					name: 'Lemon Tea',
+					start: Date.UTC(2014, 10, 18),
+					end: Date.UTC(2014, 11, 20)
+				},
+				{
+					name: 'Stapler',
+					start: Date.UTC(2014, 11, 18),
+					end: Date.UTC(2014, 12, 20)
+				},
+				{
+					name: 'Sierra',
+					start: Date.UTC(2014, 12, 18),
+					end: Date.UTC(2014, 12, 20)
+				},
+			],
+		}],
+	});
+}