diff --git a/README.md b/README.md
index 11b09df..67d1504 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,10 @@ To the user, the entire process happens in DMs with the bot.
 
 Inspired by Reddit's modmail system.
 
+**⚠ Note on updating to v3.0.0:** If you're currently using a *very* old version of the bot, from before February 2018, you'll first need to update to v2.30.1 and run the bot once before updating to v3.0.0.
+
+Always take a backup of your `db/data.sqlite` file before updating the bot.
+
 ## Getting started
 * **[🛠️ Setting up the bot](docs/setup.md)**
 * **[🙋 Frequently Asked Questions](docs/faq.md)**