diff --git a/README.md b/README.md
index 5c6a9aa..95c0cf0 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,13 @@
 # Managing LaTeX lecture notes
 
-This repository complements my [third blog post about my note taking setup](https://castel.dev/post/lecture-notes-3).
+This repository complements my [third blog post about my note taking
+setup](https://castel.dev/post/lecture-notes-3).
 
-To get the calendar script working, follow step 1 and 2 of the [Google Calendar Python Quickstart](https://developers.google.com/calendar/quickstart/python), and place `credentials.json` in the `scripts` directory.
+
+## Setup Google Calendar integration
+
+To get the calendar script (`countdown.py`) working, follow step 1 and 2 of the [Google
+Calendar Python Quickstart](https://developers.google.com/calendar/quickstart/python), and
+place `credentials.json` in the `scripts` directory.
+Then open `config.py` and edit the `ROOT` as well as the `USERCALENDARID`
+variables to your own needs.