diff --git a/packages/spec/package.json b/packages/spec/package.json
index d9b86128c2..3cfb598a9f 100644
--- a/packages/spec/package.json
+++ b/packages/spec/package.json
@@ -23,7 +23,8 @@
 	"files": [
 		"dist",
 		"LICENSE",
-		"README.md"
+		"README.md",
+    "index.js"
 	],
 	"gitHead": "4476da28dbbc2824e680137aa28b2b91b5afabec"
 }