From the latest gem's version, `elasticsearch-transport.gemspec`: ```ruby ... s.add_dependency "faraday", '>= 0.14', "< 1" ... ``` However, the change `s.add_dependency "faraday", '~>1'` was done a month ago in this commit https://github.com/elastic/elasticsearch-ruby/commit/d3d778aaeda6cd019960e6b245ef7941bbf26885.