diff --git a/package.json b/package.json
index 8b69b4a..ed6bb6b 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,9 @@
   "description": "A test suite and interface you can use to implement a connection interface.",
   "leadMaintainer": "Jacob Heun <jacobheun@gmail.com>",
   "main": "src/index.js",
+  "files": [
+    "src"
+  ],
   "scripts": {
     "lint": "aegir lint",
     "build": "aegir build",