dpl: Unable to deploy new gem with latest gems

Having pretty standard configuration:

language: ruby
rvm:
 - 2.0.0
 - 2.4.0

install:
 - gem install bundler
 - bundle install
 - gem install rspec
 - gem install coveralls

script: rspec

deploy: 
 provider: rubygems
 api_key: $RUBYGEMS_API_KEY
 gemspec: my-new-gem.gemspec
 on: 
  tags: true

I couldn’t push new gem to RubyGems.org. Travis gave me following error:

/home/travis/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/json/common.rb:155:in `parse': 757: unexpected token at 'This rubygem could not be found.' (JSON::ParserError)
	from /home/travis/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/json/common.rb:155:in `parse'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/gems-1.0.0/lib/gems/client.rb:27:in `info'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/gems-1.0.0/lib/gems.rb:17:in `method_missing'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/provider/rubygems.rb:27:in `check_app'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/provider.rb:135:in `block in deploy'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/cli.rb:41:in `fold'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/provider.rb:133:in `deploy'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/cli.rb:32:in `run'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/lib/dpl/cli.rb:7:in `run'
	from /home/travis/.rvm/gems/ruby-2.2.0/gems/dpl-1.8.31/bin/dpl:5:in `<top (required)>'
	from /home/travis/.rvm/gems/ruby-2.2.0/bin/dpl:23:in `load'
	from /home/travis/.rvm/gems/ruby-2.2.0/bin/dpl:23:in `<main>'
	from /home/travis/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
	from /home/travis/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'

Seems that problem is in updated dpl >= 1.8.30 which transitively includes gems-1.0.0.

When I used this deployment script, my problem was solved:

#!/bin/sh

yes y | gem uninstall dpl
yes y | gem uninstall gems
gem install gems -v 0.8.3
gem install dpl -v 1.8.27
dpl --provider=rubygems --api-key=$RUBY_GEMS_API_KEY --gemspec=./my-new-gem.gemspec