Problem installing "gem install jekyll bundler" on Mac Big Sur

[Tuminha]

Dear team

I’m stuck, and I need your help.

When I try to run the "gem install jekyll bundler” I get this message:

francisco@iMac-de-Francisco ~ % gem install jekyll bundler
ERROR: While executing gem ... (Errno::EACCES)
Permission denied @ rb_sysopen - /usr/local/lib/ruby/gems/3.0.0/gems/jekyll-4.2.0/.rubocop.yml
francisco@iMac-de-Francisco ~ % gem install jekyll bundler
ERROR: While executing gem ... (Errno::EACCES)
Permission denied @ rb_sysopen - /usr/local/lib/ruby/gems/3.0.0/gems/jekyll-4.2.0/.rubocop.yml

Please, let me know what I should do.

Thank you in advance.

regards