diff --git a/index.d.ts b/index.d.ts
index 2b107622..14f532ff 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -114,7 +114,7 @@ export default class RNCallKeep {
   static setReachable() {
 
   }
-  static isCallActive(uuid: string): void{
+  static isCallActive(uuid: string): Promise<boolean> {
 
   }
   /**