diff --git a/example/package.json b/example/package.json
index fa6cfeef4c..9be384196e 100644
--- a/example/package.json
+++ b/example/package.json
@@ -14,6 +14,6 @@
     "react-navigation": "^1.0.0-beta.9"
   },
   "scripts": {
-    "clean-install": "rm -rf node_modules && npm cache clean && watchman watch-del-all && npm install"
+    "clean-install": "rm -rf node_modules && npm cache clean --force && watchman watch-del-all && npm install"
   }
 }