I have a rails app and when I run it locally, it works fine. But when I upload my app to Heroku, I get the following error when uploading:

```
/usr/bin/env: ruby1.9.1: No such file or directory

```

and this error when I request the page:

```
2014-02-03T01:52:52.032866+00:00 heroku[router]: at=error code=H10 desc="App crashed"       method=GET path=/favicon.ico host=whispering-fortress-2710.herokuapp.com request_id=5db8fbf4-2250-4e95-8b99-387f98248f02 fwd="50.148.151.110" dyno= connect= service= status=503 bytes=

```

Anyone know how to fix this?