diff --git a/package.json b/package.json
index a895ffe..be691e9 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
   "files": [
     "LICENSE",
     "README.md",
+    "index.d.ts",
     "index.js",
     "package.json",
     "test.js",