diff --git a/lib/year_holidays/index.js b/lib/year_holidays/index.js
index 48b804b..fc0adf4 100644
--- a/lib/year_holidays/index.js
+++ b/lib/year_holidays/index.js
@@ -1,7 +1,11 @@
 "use strict";
 var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
     if (k2 === undefined) k2 = k;
-    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
 }) : (function(o, m, k, k2) {
     if (k2 === undefined) k2 = k;
     o[k2] = m[k];
diff --git a/package-lock.json b/package-lock.json
index 7402294..44324b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "korean-business-day",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "korean-business-day",
-      "version": "2.0.0",
+      "version": "2.1.0",
       "devDependencies": {
         "@croquiscom/eslint-config": "^1.9.0",
         "@types/chai": "^4.3.0",
diff --git a/package.json b/package.json
index 2c1692f..3dcdb6c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "korean-business-day",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "Node module for korean business days",
   "main": "./lib",
   "types": "./lib/index.d.ts",