diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..aa05d1d
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,4 @@
+import { RedisClientType } from 'redis';
+
+declare function redisLock(client: RedisClientType, retryDelay?: number): (lockName: string, timeout?: number) => Promise<string | undefined>;
+export = redisLock;
diff --git a/package.json b/package.json
index cddc1af..564820f 100644
--- a/package.json
+++ b/package.json
@@ -8,6 +8,7 @@
     "url": "git://github.com/errorception/redis-lock.git"
   },
   "main": "index.js",
+  "types": "index.d.ts",
   "engines": {
     "node": ">=12"
   },