I've encountered the conflict with slop when I run my small ruby script on my box. Error message is like below.

my/ruby/path/2.2.0/rubygems/specification.rb:1638:in `raise_if_conflicts': Unable to activate pry-0.10.3, because slop-4.2.0 conflicts with slop (~> 3.4) (Gem::LoadError)

In my script, I'm requiring slop and pry and these gems on my machine are pry ~> 0.10.3 and slop ~> 4.2.0. Probably, the problem is slop has breaking change when release version 4 (See here) and pry depends still on the slop version 3?
( I'm sorry if this issue is duplicated with already ones and feel free to close this in that case! )