diff --git a/.gitignore b/.gitignore
index 38bb7dea..65f40509 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ shared/pdf_viewer.css
 shared/pdf_viewer.js
 shared/pdf_viewer.js.map
 shared/cmaps/
+types/
diff --git a/package-lock.json b/package-lock.json
index 519d99b1..d5dc4de5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,6 +31,7 @@
         "sinon": "^9.0.2",
         "sinon-chai": "^3.3.0",
         "terser-webpack-plugin": "^4.2.3",
+        "typescript": "^4.5.5",
         "webpack": "^4.34.0",
         "webpack-cli": "^4.7.2",
         "webpack-dev-server": "^3.7.2"
@@ -11853,6 +11854,19 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
+    "node_modules/typescript": {
+      "version": "4.5.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.5.tgz",
+      "integrity": "sha512-TCTIul70LyWe6IJWT8QSYeA54WQe8EjQFU4wY52Fasj5UKx88LNYKCgBEHcOMOrFF1rKGbD8v/xcNWVUq9SymA==",
+      "dev": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
+    },
     "node_modules/ua-parser-js": {
       "version": "0.7.31",
       "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.31.tgz",
@@ -22990,6 +23004,12 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
+    "typescript": {
+      "version": "4.5.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.5.5.tgz",
+      "integrity": "sha512-TCTIul70LyWe6IJWT8QSYeA54WQe8EjQFU4wY52Fasj5UKx88LNYKCgBEHcOMOrFF1rKGbD8v/xcNWVUq9SymA==",
+      "dev": true
+    },
     "ua-parser-js": {
       "version": "0.7.31",
       "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.31.tgz",
diff --git a/package.json b/package.json
index 782f6edb..245d2b08 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "2.4.0",
   "description": "Annotation layer for pdf.js",
   "main": "index.js",
+  "types": "types",
   "scripts": {
     "test": "karma start --single-run",
     "start": "./scripts/web",
@@ -10,7 +11,8 @@
     "startindocker": "./scripts/web-docker",
     "build": "webpack && MINIFY=1 webpack",
     "codecov": "codecov",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build && npm run types",
+    "types": "tsc"
   },
   "repository": {
     "type": "git",
@@ -58,6 +60,7 @@
     "sinon": "^9.0.2",
     "sinon-chai": "^3.3.0",
     "terser-webpack-plugin": "^4.2.3",
+    "typescript": "^4.5.5",
     "webpack": "^4.34.0",
     "webpack-cli": "^4.7.2",
     "webpack-dev-server": "^3.7.2"
@@ -69,6 +72,7 @@
     "dist",
     "src",
     "index.js",
+    "types",
     "LICENSE.md",
     "README.md",
     "webpack.config.js"
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..9eccdc60
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "include": ["src/**/*.js", "index.js"],
+    "compilerOptions": {
+        "allowJs": true,
+        "declaration": true,
+        "emitDeclarationOnly": true,
+        "declarationMap": true,
+        "outDir": "types"
+    }
+}