Could not find activesupport-5.2.3 in any of the sources
Run `bundle install` to install missing gems.

Bundler attempted to update activesupport but its version stayed the same
Bundle updated!

docker-compose run web gem install activesupport
Fetching activesupport-5.2.3.gem
Successfully installed activesupport-5.2.3
1 gem installed

$ docker-compose run web bin/rspec ./spec/some_spec.rb
Could not find activesupport-5.2.3 in any of the sources
Run `bundle install` to install missing gems.