diff --git a/package.json b/package.json
index 8b44563..5594903 100644
--- a/package.json
+++ b/package.json
@@ -38,5 +38,11 @@
     "nyc": "^12.0.2",
     "rewire": "^4.0.1",
     "sinon": "^6.1.3"
-  }
+  },
+  "files": [
+    "lib/",
+    "index.js",
+    "LICENSE",
+    "README.md"
+  ]
 }