diff --git a/package.json b/package.json
index bae87fd..b381c8e 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
   },
   "type": "module",
   "exports": {
+    "types": "./types/index.d.ts",
     "script": "./perf-ref.umd.js",
     "default": "./perf-ref.esm.js"
   },