scala - Ensime configuration for scala library

Question

This is the code I'm trying to run:

import scalaj.http.Http
Http("http://foo.com/search").param("q","monkeys").asString

I am getting a red bar inside emacs at line 1, which I believe is ensime telling me that it couldn't find the imported library, how do I tell ensime that I want it to recognize a jar? I've tried adding the path to the jar in :compile-deps and :runtime-deps in my .ensime but without success.

I am using emacs-snapshot-gtk (v24.3.50.1) along with ensime 0.1.1.

This is my build.sbt, placed at the root of my project:

scalaVersion := "2.10.0"

retrieveManaged := true

libraryDependencies += "org.scalaj" %% "scalaj-http" % "0.3.7"