diff --git a/README.md b/README.md
index fd1d7ee..5c6a9aa 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # Managing LaTeX lecture notes
 
 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.