diff --git a/README.md b/README.md
index 91527aa..7605b59 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,8 @@ depends on:
 * `[coreutils](coreutils)` (`basename`, `md5sum` and `date`)
 
 You can generate the output with `make` and deploy with `make deploy`.
+
+## Replace the currently published file
+
+Add the new file as `data/activities-YYYYMMDD.xml` where `YYYYMMDD` is today's
+date and run `make deploy`. **DO NOT FORGET TO COMMIT YOUR CHANGES!**