Bootstrap 3 will still get bugfixes. Under the Internet Explorer section on [0]: > If you require IE8-9 support, use Bootstrap 3. It’s the most stable version

Bootstrap 3 will still get bugfixes. Under the Internet Explorer section on [0]: > If you require IE8-9 support, use Bootstrap 3. It’s the most stable version of our code and is still supported by our team for critical bugfixes and documentation changes. However, no new features will be added to it. [0] https://v4-alpha.getbootstrap.com/getting-started/browsers-devices/#internet-explorer https://v4-alpha.getbootstrap.com/getting-started/browsers-d...