diff --git a/example/example.ts b/example/example.ts
index 4616598..6b14448 100644
--- a/example/example.ts
+++ b/example/example.ts
@@ -1,3 +1,3 @@
 import { init } from '../dist/es2015';
 
-init('http://localhost:8080/pdf.worker.min.js');
\ No newline at end of file
+init('http://localhost:8080/pdf.worker.min.mjs');
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index a0fb873..833481d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "document-viewer-ts",
-  "version": "0.7.0-legacy",
+  "version": "1.0.0-legacy",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "document-viewer-ts",
-      "version": "0.7.0-legacy",
+      "version": "1.0.0-legacy",
       "license": "MIT",
       "devDependencies": {
         "@playwright/test": "^1.42.1",
@@ -23,7 +23,7 @@
         "core-js": "~3.23.3",
         "eslint": "~8.38.0",
         "express": "^4.18.3",
-        "pdfjs-dist": "3.11.174",
+        "pdfjs-dist": "4.3.136",
         "process": "~0.11.10",
         "react": "^16.9.0",
         "react-dom": "^16.9.0",
@@ -3178,27 +3178,27 @@
         "node": ">=8"
       }
     },
-    "node_modules/path2d-polyfill": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/path2d-polyfill/-/path2d-polyfill-2.0.1.tgz",
-      "integrity": "sha512-ad/3bsalbbWhmBo0D6FZ4RNMwsLsPpL6gnvhuSaU5Vm7b06Kr5ubSltQQ0T7YKsiJQO+g22zJ4dJKNTXIyOXtA==",
+    "node_modules/path2d": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/path2d/-/path2d-0.2.0.tgz",
+      "integrity": "sha512-KdPAykQX6kmLSOO6Jpu2KNcCED7CKjmaBNGGNuctOsG0hgYO1OdYQaan6cYXJiG0WmXOwZZPILPBimu5QAIw3A==",
       "dev": true,
       "optional": true,
       "engines": {
-        "node": ">=8"
+        "node": ">=6"
       }
     },
     "node_modules/pdfjs-dist": {
-      "version": "3.11.174",
-      "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-3.11.174.tgz",
-      "integrity": "sha512-TdTZPf1trZ8/UFu5Cx/GXB7GZM30LT+wWUNfsi6Bq8ePLnb+woNKtDymI2mxZYBpMbonNFqKmiz684DIfnd8dA==",
+      "version": "4.3.136",
+      "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-4.3.136.tgz",
+      "integrity": "sha512-gzfnt1qc4yA+U46golPGYtU4WM2ssqP2MvFjKga8GEKOrEnzRPrA/9jogLLPYHiA3sGBPJ+p7BdAq+ytmw3jEg==",
       "dev": true,
       "engines": {
         "node": ">=18"
       },
       "optionalDependencies": {
         "canvas": "^2.11.2",
-        "path2d-polyfill": "^2.0.1"
+        "path2d": "^0.2.0"
       }
     },
     "node_modules/picocolors": {
diff --git a/package.json b/package.json
index f4b0ce3..6a9dcca 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "document-viewer-ts",
-  "version": "0.7.1-legacy",
+  "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",
@@ -13,8 +13,7 @@
     "styles"
   ],
   "scripts": {
-    "build": "npm run build-es2015 && npm run build-cjs",
-    "build-cjs": "tsc -p tsconfig.commonjs.json",
+    "build": "npm run build-es2015",
     "build-es2015": "tsc -p tsconfig.json",
     "build-example": "npm run build && tsc -p tsconfig.example.json && webpack",
     "clean": "rimraf ./dist ./build",
@@ -68,7 +67,7 @@
     "core-js": "~3.23.3",
     "eslint": "~8.38.0",
     "express": "^4.18.3",
-    "pdfjs-dist": "3.11.174",
+    "pdfjs-dist": "4.3.136",
     "process": "~0.11.10",
     "react": "^16.9.0",
     "react-dom": "^16.9.0",
diff --git a/src/base.ts b/src/base.ts
index 51ef4aa..069a87e 100644
--- a/src/base.ts
+++ b/src/base.ts
@@ -1,4 +1,4 @@
-import {  GlobalWorkerOptions, PDFDocumentProxy, PDFPageProxy, PageViewport, getDocument, renderTextLayer } from 'pdfjs-dist/legacy/build/pdf';
+import { GlobalWorkerOptions, PDFDocumentProxy, PDFPageProxy, PageViewport, getDocument, renderTextLayer } from 'pdfjs-dist/legacy/build/pdf.mjs';
 import type { TextContent } from 'pdfjs-dist/types/src/display/api';
 
 const chevronLeft = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-chevron-left" viewBox="0 0 16 16">
@@ -36,7 +36,7 @@ const scaleTextLayer = async (
     textContentSource: textContent,
     container: textLayerFragment,
     viewport: vs
-  }).promise;
+  })?.promise;
   textLayerDiv.appendChild(textLayerFragment);
 };
 
diff --git a/tsconfig.commonjs.json b/tsconfig.commonjs.json
deleted file mode 100644
index 6620f81..0000000
--- a/tsconfig.commonjs.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "extends": "./tsconfig.json",
-  "compilerOptions": {
-    "module": "commonjs",
-    "outDir": "./dist/lib",
-  },
-}
diff --git a/tsconfig.example.json b/tsconfig.example.json
index 992ee72..d7b550f 100644
--- a/tsconfig.example.json
+++ b/tsconfig.example.json
@@ -1,7 +1,6 @@
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
-    "module": "commonjs",
     "outDir": "./build",
   },
   "include": [
diff --git a/webpack.config.js b/webpack.config.js
index 70c56ae..e2b73a8 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -14,7 +14,7 @@ module.exports = {
   },
   plugins: [
     new webpack.ProvidePlugin({
-      process: 'process/browser',
+      process: 'process/browser.js',
     }),
   ]
 };
\ No newline at end of file