Facing this issue : http://stackoverflow.com/questions/36031706/middleware-stack-js31-uncaught-error-handler-with-name-route-already-exists The solution is to use iron:middleware-stack@1.1.0 Currently iron-routing package has a dependency on iron:router@1.0.9 as seen [here](https://github.com/meteor-useraccounts/iron-routing/blob/v1.14.2/package.js#L28) Can we upgrade this dependency to iron:router@1.0.13 which internally has dependency on iron:middleware-stack@1.0.11 as seen [here](https://github.com/iron-meteor/iron-router/blob/15a3375fd889b46463584676cc13343b78ccabaf/package.js#L35) This should resolve the dependency while downloading iron-routing package and its dependencies.