Can't install milia. plz help.

i replace the milia line in my Gemfile in a project with:
gem ‘milia’, github: ‘jekuno/milia’, branch: 'issue#76
and run bundle install.
but it gives me the following error…

fatal: Needed a single revision
Revision issue#76 does not exist in the repository Maybe you misspelled it?

why it has occurred? plz help…