Error: Cannot find module './proto' on Heroku

I can't seem to figure out why this works locally fine, but when I push it to Heroku it fails with the following error.

Error from Heroku

Starting process with command `node web.js`

module.js:337
    throw new Error("Cannot find module '" + request + "'");
          ^
Error: Cannot find module './proto'
    at Function._resolveFilename (module.js:337:11)
    at Function._load (module.js:279:25)
    at Module.require (module.js:359:17)
    at require (module.js:375:17)
    at Object.<anonymous> (/app/node_modules/express/node_modules/connect/lib/connect.js:14:13)
    at Module._compile (module.js:446:26)
    at Object..js (module.js:464:10)
    at Module.load (module.js:353:31)
    at Function._load (module.js:311:12)
    at Module.require (module.js:359:17)
Process exited with status 1
State changed from starting to crashed

package.json

{
  "name": "divtest",
  "version": "0.0.2",
  "dependencies": {
    "underscore": "1.3.x",
    "crypto": "0.0.x",
    "knox": "0.3.x",
    "mongoose": "~3.1.2",
    "mime": "1.2.x",
    "express": "3.0.x",
    "request": "~2.9.203"
  },
  "engines": {
    "node": "0.6.x",
    "npm": "1.0.x"
  }
}

./proto is a local module that connect is calling

I've blown away my ./node_modules folder and did a npm install --save and still get the same results.