diff --git a/ts/index.ts b/ts/index.ts
index 341d1ad..539c815 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -85,7 +85,7 @@ export const map = async <T>(inputArg: T[], functionArg: IAsyncFunction<T>) => {
 };
 
 export const timeoutWrap = <T = any>(promiseArg: Promise<T>, timeoutInMs: number) => {
-  return new Promise((resolve, reject) => {
+  return new Promise<T>((resolve, reject) => {
     setTimeout(() => {
       reject(new Error('timeout'));
     }, timeoutInMs);