Error deploying to HTTPS Slack endpoint - end of file reached (EOFError)

Getting an error

    /Users/johnkoht/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/net/protocol.rb:141:in `read_nonblock': end of file reached (EOFError)


Seems to be related to the HTTPS endpoint for the API. Not sure if this was changed at some point. http://stackoverflow.com/a/9227933/784132