diff --git a/src/package.json b/src/package.json
index 431cf5fd..f4da3b35 100644
--- a/src/package.json
+++ b/src/package.json
@@ -13,7 +13,8 @@
     "common/modules.js",
     "common/http.js",
     "common/crypto-js.js",
-    "common/regular.js"
+    "common/regular.js",
+    "common/observer.js"
   ],
   "dependencies": {
   }