Update README.md

Author: kyb3r

README.md

@@ -59,7 +59,7 @@ This list is ever growing thanks to active development and our exceptional contr
 ## Installation
 
 ### Heroku
-Currently, the easiest way to set up the bot is by using Heroku, a container-based cloud platform. Installation via Heroku is done in your web browser and keeps the bot online 24/7 for free. The [**installation guide**](https://github.com/kyb3r/modmail/wiki/Installation) will guide you through the entire installation process. If you run into any problems, join the [development server](https://discord.gg/etJNHCQ) for help and support. 
+Currently, the easiest way to set up the bot is by using Heroku, a container-based cloud platform. Installation via Heroku is done in your web browser and keeps the bot online 24/7 for free (If you verify with a credit card). The [**installation guide**](https://github.com/kyb3r/modmail/wiki/Installation) will guide you through the entire installation process. If you run into any problems, join the [development server](https://discord.gg/etJNHCQ) for help and support. 
 
 ### Locally 
 Installation locally for development reasons or otherwise is as follows, you will need `python 3.7`.