The bcrypt-ruby gem has changed its name to just bcrypt

When i try to install gem 'bcrypt', '~> 3.1.7' gem after run " `require': cannot load such file -- bcrypt_ext (LoadError)" this error comes. I read som articles and it says install gem 'bcrypt-ruby', and then when i install that after "bundle install" this gives. What should I do??enter image description here