diff --git a/packages/p1/index.js b/packages/p1/index.js
index 57ef8ac..82794ca 100644
--- a/packages/p1/index.js
+++ b/packages/p1/index.js
@@ -1,3 +1,3 @@
-module.exports = function sum(a, b) {
+module.exports = (a, b) => {
   return a+b;
 }