Error while installing gem in rails 5.0.0.1

[RisingPlay]

Bundler could not find compatible versions for gem "rack":

In Gemfile:

rails (>= 5.0.0.1, ~> 5.0.0) was resolved to 5.0.0.1, which depends on
  actionpack (= 5.0.0.1) was resolved to 5.0.0.1, which depends on
    rack (~> 2.0)

youtube_it (>= 2.4.2, ~> 2.4) was resolved to 2.4.2, which depends on
  oauth2 (~> 1.0.0) was resolved to 1.0.0, which depends on
    rack (~> 1.2)

Please help me , I'm trying to install gem in rails 5.0.0.1