diff --git a/example/example.ts b/example/example.ts
index 6b14448..d43c783 100644
--- a/example/example.ts
+++ b/example/example.ts
@@ -1,3 +1,3 @@
-import { init } from '../dist/es2015';
+import { init } from '../dist/es2020';
 
 init('http://localhost:8080/pdf.worker.min.mjs');
\ No newline at end of file
diff --git a/package.json b/package.json
index 6a9dcca..e41311d 100644
--- a/package.json
+++ b/package.json
@@ -3,8 +3,8 @@
   "version": "1.0.0-legacy",
   "description": "PDF and MS Doc viewer written in TypeScript for React and vanilla JavaScript",
   "main": "dist/lib/index.js",
-  "module": "dist/es2015/index.js",
-  "types": "dist/es2015/index.d.ts",
+  "module": "dist/es2020/index.js",
+  "types": "dist/es2020/index.d.ts",
   "engines": {
     "node": ">=18.15.0"
   },
@@ -13,8 +13,8 @@
     "styles"
   ],
   "scripts": {
-    "build": "npm run build-es2015",
-    "build-es2015": "tsc -p tsconfig.json",
+    "build": "npm run build-es2020",
+    "build-es2020": "tsc -p tsconfig.json",
     "build-example": "npm run build && tsc -p tsconfig.example.json && webpack",
     "clean": "rimraf ./dist ./build",
     "lint:no-fix": "eslint --config='.eslintrc.js' './src/*.{ts,tsx}' './tests/*.{ts,tsx}'",
diff --git a/tsconfig.json b/tsconfig.json
index fec37f1..fa4e596 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,9 +8,9 @@
     "jsx": "react",
     "lib": [
       "dom",
-      "es2015"
+      "es2020"
     ],
-    "module": "es2015",
+    "module": "es2020",
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noErrorTruncation": true,
@@ -21,10 +21,10 @@
     "noUnusedLocals": false,
     "noUnusedParameters": false,
     "pretty": true,
-    "outDir": "./dist/es2015",
+    "outDir": "./dist/es2020",
     "sourceMap": true,
     "strict": true,
-    "target": "es2015"
+    "target": "es2020"
   },
   "include": [
     "src/*"