Ruby on rails 法拉第0.9.1打破平衡宝石

由于此错误，我无法迁移，经过数小时的尝试后，我找不到修复程序

rake aborted!
NoMethodError: undefined method `register_middleware' for #<Faraday::Connection:0x007fe658934bd0>
/Library/Ruby/Gems/2.0.0/gems/faraday-0.9.1/lib/faraday.rb:99:in `method_missing'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced/client.rb:41:in `build_conn'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced/client.rb:30:in `initialize'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced.rb:29:in `new'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced.rb:29:in `configure'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced.rb:86:in `<module:Balanced>'
/Library/Ruby/Gems/2.0.0/gems/balanced-0.8.1/lib/balanced.rb:11:in `<top (required)>'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:76:in `require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:72:in `each'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:72:in `block in require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:61:in `each'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler/runtime.rb:61:in `require'
/Library/Ruby/Gems/2.0.0/gems/bundler-1.7.12/lib/bundler.rb:134:in `require'

rake中止！
NoMethodError:未定义的方法“register\u middleware”#
/Library/Ruby/Gems/2.0.0/Gems/faraday-0.9.1/lib/faraday.rb:99:in'method_missing'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced/client.rb:41:in'build_conn'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced/client.rb:30:in'initialize'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced.rb:29:in'new'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced.rb:29:in'configure'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced.rb:86:in`'
/Library/Ruby/Gems/2.0.0/Gems/balanced-0.8.1/lib/balanced.rb:11:in`'
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:76:in'require'
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:76:“请求中的块（2级）”中
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:72:in'each'
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:72:在'block in require'中
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:61:in'each'
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler/runtime.rb:61:in'require'
/Library/Ruby/Gems/2.0.0/Gems/bundler-1.7.12/lib/bundler.rb:134:in'require'

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任何人都可以提供一些帮助？

使用法拉第0.9.1和平衡0.8.1有一个已知的问题。官方详情/进展如下：