diff --git a/types/mapbox-gl/index.d.ts b/types/mapbox-gl/index.d.ts
index 26b37616f7..fc78b68361 100644
--- a/types/mapbox-gl/index.d.ts
+++ b/types/mapbox-gl/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for Mapbox GL JS v0.53.0
+// Type definitions for Mapbox GL JS v0.54.0
 // Project: https://github.com/mapbox/mapbox-gl-js
 // Definitions by: Dominik Bruderer <https://github.com/dobrud>
 //                 Patrick Reames <https://github.com/patrickr>
@@ -658,6 +658,10 @@ declare namespace mapboxgl {
         setHTML(html: string): this;
 
         setDOMContent(htmlNode: Node): this;
+
+        getMaxWidth(): string;
+
+        setMaxWidth(maxWidth: string): this;
     }
 
     export interface PopupOptions {
@@ -670,6 +674,8 @@ declare namespace mapboxgl {
         offset?: number | PointLike | { [key: string]: PointLike; };
 
         className?: string;
+
+        maxWidth?: string;
     }
 
     export interface Style {
diff --git a/types/mapbox-gl/mapbox-gl-tests.ts b/types/mapbox-gl/mapbox-gl-tests.ts
index 2db8e2855f..875b0720d6 100644
--- a/types/mapbox-gl/mapbox-gl-tests.ts
+++ b/types/mapbox-gl/mapbox-gl-tests.ts
@@ -289,10 +289,24 @@ map.removeFeatureState(featureIdentifier);
 /**
  * Popup
  */
-var popup = new mapboxgl.Popup({closeOnClick: false, closeButton: true, anchor: 'top-right', offset: {'top': [0,0], 'bottom': [25,-50]}, className: 'custom-class' })
+const popupOptions = {
+	closeOnClick: false,
+	closeButton: true,
+	anchor: 'top-right' as mapboxgl.Anchor,
+	offset: {
+		'top': [0,0] as [number, number],
+		'bottom': [25,-50] as [number, number]
+	},
+	className: 'custom-class',
+	maxWidth: '400px'
+};
+expectType<mapboxgl.PopupOptions>(popupOptions);
+const popup = new mapboxgl.Popup(popupOptions)
 	.setLngLat([-50, 50])
 	.setHTML('<h1>Hello World!</h1>')
+	.setMaxWidth('none')
 	.addTo(map);
+popup.getMaxWidth();
 
 /**
  * Add an image