Dependency issues

[ageis]

I use RVM and have a project depending on older versions of Ruby... Under 2.1.10, 2.2.7 and 2.3.4 I reliably encounter this on attempting to bundle install or update. Is there an earlier branch or release I can pin to for compatibility?

Bundler could not find compatible versions for gem "activesupport":
  In Gemfile:
    twitter-bootstrap-rails was resolved to 4.0.0, which depends on
      railties (>= 5.0.1, ~> 5.0) was resolved to 5.0.1, which depends on
        actionpack (= 5.0.1) was resolved to 5.0.1, which depends on
          activesupport (= 5.1.3)

    twitter-bootstrap-rails was resolved to 4.0.0, which depends on
      railties (>= 5.0.1, ~> 5.0) was resolved to 5.0.1, which depends on
        activesupport (= 5.0.1)

    twitter-bootstrap-rails was resolved to 4.0.0, which depends on
      railties (>= 5.0.1, ~> 5.0) was resolved to 5.0.1, which depends on
        activesupport (= 5.0.1)