diff --git a/types/howler/index.d.ts b/types/howler/index.d.ts
index b4c7ad5c52..8b3e2772be 100644
--- a/types/howler/index.d.ts
+++ b/types/howler/index.d.ts
@@ -28,11 +28,11 @@ interface HowlerGlobal {
 declare let Howler: HowlerGlobal;
 
 interface IHowlSoundSpriteDefinition {
-    [name: string]: [number, number]|[number, number, boolean]
+    [name: string]: [number, number] | [number, number, boolean]
 }
 
 interface IHowlProperties {
-    src: string|string[];
+    src: string | string[];
     volume?: number;
     html5?: boolean;
     loop?: boolean;
@@ -60,7 +60,7 @@ interface IHowlProperties {
 }
 
 interface Howl {
-    play(spriteOrId?: string|number): number; // .play() is not chainable; the other methods are
+    play(spriteOrId?: string | number): number; // .play() is not chainable; the other methods are
     pause(id?: number): this;
     stop(id?: number): this;
 
@@ -78,10 +78,10 @@ interface Howl {
     rate(rate: number, id: number): this;
 
     seek(seek?: number, id?: number): this | number;
-    
+
     loop(id?: number): boolean;
     loop(loop: boolean, id?: number): this;
-    
+
     playing(id?: number): boolean;
     duration(id?: number): number;
     state(): 'unloaded' | 'loading' | 'loaded';
@@ -119,18 +119,21 @@ interface Howl {
     once(event: 'unlock', callback: (soundId: number) => void, id?: number): this;
 
     off(event: string, callback?: Function, id?: number): this;
+    off(): this;
 
     stereo(pan: number, id?: number): this | void;
     pos(x: number, y: number, z: number, id?: number): this | void;
     orientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): this | void;
-    pannerAttr(o: {coneInnerAngle?: number,
+    pannerAttr(o: {
+        coneInnerAngle?: number,
         coneOuterAngle?: number, coneOuterGain?: number,
         distanceModel: 'inverse' | 'linear', maxDistance: number,
-        panningModel: 'HRTF' | 'equalpower', refDistance: number, rolloffFactor: number}, id?: number): this;
+        panningModel: 'HRTF' | 'equalpower', refDistance: number, rolloffFactor: number
+    }, id?: number): this;
 }
 
 interface HowlStatic {
-    new (properties: IHowlProperties): Howl;
+    new(properties: IHowlProperties): Howl;
 }
 
 declare let Howl: HowlStatic;