Heroku not updating website after successful deploy

I'm trying to deploy my app through Heroku, using Ruby on Rails, and I have been successful in the past but now when I use the same commands as before it will deploy successfully but when I visit my website it has not been updated with my new code.

Here are the commands I am using:

git add -A
git commit -m "message"
git push
git push heroku
heroku run rake db:migrate

I tried using "git push heroku master" as well based on another stack overflow thread but it didn't update my website either. Running the deployment only returns one warning and that is that my Ruby version is not declared so I don't think that would be an issue. I'd be happy to provide more information if I need to. Any information/help would be greatly appreciated.