The dependency mismatch with devtools' rspec

[ch1c0t]

➜  adamantium git:(master) bundle
Updating https://github.com/rom-rb/devtools.git
Updating https://github.com/mbj/mutant.git
Fetching gem metadata from https://rubygems.org/.........
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies....
Bundler could not find compatible versions for gem "rspec":
  In Gemfile:
    devtools (>= 0) ruby depends on
      rspec (~> 3.3.0) ruby

    rspec (~> 3.0.0) ruby