<!-- Hey there, you have a question? We are happy to answer. Please make sure no similar question was opened already. The following template is a suggestion how you can report an issue you run into whilst using our library. If you just want to ask a question, feel free to delete everything; just make sure you have a describing title :) Please mind that there is also a users' Telegram group at https://t.me/pythontelegrambotgroup for questions about the library. Questions asked there might be answered quicker than here. In case you are unable to join our group due to Telegram restrictions, you can use our IRC channel at https://webchat.freenode.net/?channels=##python-telegram-bot to participate in the group. --> ### Issue I am facing I am migrating from version11 to 12 following https://github.com/python-telegram-bot/python-telegram-bot/wiki/Transition-guide-to-Version-12.0 and created the new style handler as described: `def start(update: Update, context: CallbackContext): ` But I get the error: `ImportError: cannot import name 'Update' from 'telegram.ext' ` It is nowhere in the migration guide where to import it. It is also not in the first bot tutorial: https://github.com/python-telegram-bot/python-telegram-bot/wiki/Extensions-%E2%80%93-Your-first-Bot (also this tutorial seems updated, it does not use the "new style").