Reported ember version does not match bower.json

At some point we upgraded from Ember 1.13 to 2.2, are using 2.2 features, and our bower.json has

{
  "name": "<our project name>",
  "dependencies": {
     "ember": "2.2.0",
     .
     .
  }
}

But ember --version output is still

version: 1.13.13
.
.

What's going on?