diff --git a/packages/isomorphic-unfetch/package.json b/packages/isomorphic-unfetch/package.json
index 24c524e..378bec1 100644
--- a/packages/isomorphic-unfetch/package.json
+++ b/packages/isomorphic-unfetch/package.json
@@ -2,6 +2,11 @@
   "name": "isomorphic-unfetch",
   "version": "2.0.0",
   "description": "Switches between unfetch & node-fetch for client & server.",
+  "files": [
+    "index.js",
+    "index.d.ts",
+    "browser.js"
+  ],
   "browser": "browser.js",
   "main": "index.js",
   "types": "index.d.ts",