diff --git a/index.d.ts b/index.d.ts
index 652e293..53761b9 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -205,7 +205,7 @@ declare module "minecraft-launcher-core" {
   import { ChildProcessWithoutNullStreams } from 'child_process'
 
   export class Client extends EventEmitter {
-    launch(options: ILauncherOptions): ChildProcessWithoutNullStreams | null;
+    launch(options: ILauncherOptions): Promise<ChildProcessWithoutNullStreams | null>;
   }
 
   export const Authenticator: IAuthenticator;