Ruby on rails安装gem puma错误

错误：[rake --tasks] /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:286:in block in verify_gemfile_dependencies_are_found!': Could not find gem 'puma (~> 3.11)' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound) from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:in each'from / Users / abhisumishra / .gem / ruby / 2.3.0 / gems / bundler-1.16.5 / lib / bundler / resolver.rb:254:in verify_gemfile_dependencies_are_found!' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:48:in start'from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler- 1.16.5 / lib / bundler / resolver.rb:22:in resolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:258:in resolve'from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:171 ：in specs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:238:in specs_for'from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:227:in requested_specs' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:108:in block in definition_method'from / Users / abhisumishra / .gem / ruby / 2.3.0 / gems / bundler-1.16.5 / lib / bundler / runtime.rb：20：in setup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler.rb:107:in setup'from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler- 1.16.5 / lib / bundler / setup.rb：20：in <top (required)>' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in require'from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require . rb：127：in rescue in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:39:in require'from / Users / abhisumishra / RubymineProjects / untit led5 / config / boot.rb：3：在 <top (required)>' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:in require_relative'来自/ Users / abhisumishra / RubymineProjects / untitled5 / bin / rake：2：在 <main>' Error:[rake --prereqs] /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:286:in block中的verify_gemfile_dependencies_are_found！ ': Could not find gem ' puma（〜> 3.11）'在Gemfile中列出的任何gem源中 . （Bundler :: GemNotFound）来自/Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:in each' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:254:in verify_gemfile_dependencies_are_found！'来自/Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:48:in start' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/resolver.rb:22:in resolve'from /Users/abhisumishra/.gem/ruby/2.3 . 0 / gems / bundler-1.16.5 / lib / bundler / definition.rb:258:in resolve' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:171:in specs'来自/Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler /definition.rb:238:in specs_for' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/definition.rb:227:in requested_specs'来自/Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:108:in block in definition_method' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/runtime.rb:20:in setup'from /用户/ abhisumishra / .gem / ruby / 2.3.0 / gems / bundler-1.16.5 / lib / bundler.rb：107：in setup' from /Users/abhisumishra/.gem/ruby/2.3.0/gems/bundler-1.16.5/lib/bundler/setup.rb:20:in 'from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/ lib / ruby / 2.3.0 / rubygems / core_ext / kernel_require.rb：127：in require' from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in rescue in require'from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/ rubygems / core_ext / kernel_require.rb：39： require' from /Users/abhisumishra/RubymineProjects/untitled5/config/boot.rb:3:in '来自/ Users / abhisumishra / RubymineProjects / untitled5 / bin / rake：2：in require_relative' from /Users/abhisumishra/RubymineProjects/untitled5/bin/rake:2:in '这些是我在尝试安装rails时遇到的错误 . 请帮忙 .