Error during program

An error occurred while installing json (1.8.3), and Bundler cannot continue.

Make sure that gem install json -v '1.8.3' succeeds before bundling.

how to fix this error??

Please run
gem list
to see if its already installed.

Rails 3 or Rails 4?

Can you show us your complete error information?

Which operating system, and which version or Ruby and Rails are you
using and what is the full error message?

Colin