diff --git a/package.json b/package.json
index dd5780d..152ed6b 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.9.3",
   "description": "A simple SHA-3 / Keccak / Shake hash function for JavaScript supports UTF-8 encoding.",
   "main": "src/sha3.js",
+  "types": "index.d.ts",
   "devDependencies": {
     "expect.js": "~0.3.1",
     "mocha": "~10.2.0",