diff --git a/package.json b/package.json
index 3da41fb..45e7cfd 100644
--- a/package.json
+++ b/package.json
@@ -74,5 +74,6 @@
     "mocha-phantomjs": "^4.1.0",
     "nyc": "^14.1.1",
     "phantomjs-prebuilt": "^2.1.16"
-  }
+  },
+  "types": "index.d.ts"
 }