diff --git a/index.d.ts b/index.d.ts
index 9ff3b12..188610d 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -5,7 +5,7 @@ export as namespace RNVolumeControl;
 
 declare namespace RNVolumeControl {
   export function change(value: number): void;
-  export function getVolume(): number;
+  export function getVolume(): Promise<number>;
 
   export type VolumeEventType = {
     volume: number;