diff --git a/package.json b/package.json
index dcd15dd..49baded 100644
--- a/package.json
+++ b/package.json
@@ -17,5 +17,8 @@
     "scripts": {
         "test": "make test"
     },
+    "files": [
+        "/lib/**"
+    ],
     "license": "MIT"
 }