diff --git a/package.json b/package.json
index f2d5853..9c068bb 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
   "license": "Apache-2.0",
   "main": "web-animations.min.js",
   "files": [
+    "src/*",
     "*.min.js",
     "*.min.js.map"
   ],