Moment dependency cant be pushed

Using freeCodeCamp nodejs tasks
trying to solve task number 6
wants me to add “moment” to dependencies
i have been submitting tasks using heroku
and when i installed moment and tried to push to heroku
i got this error message
Missing: moment@2.14.0

and my push is rejected

https://dashboard.heroku.com/apps/free-code-camp-node-js/deploy/heroku-git

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36

Challenge: Expand Your Project with External Packages from npm

Link to the challenge:

Does this help?
https://help.heroku.com/QMZ3RR7L/how-do-i-fix-a-missing-module-in-my-package-json