diff --git a/README.md b/README.md
index e0a593b..044cd48 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,15 @@
 Show upcoming events of an .ics file.
 
+Set the path to your .ics file in `src/main.c`:
+```
+const char ICS_PATH[] = "tests/calendar.ics";
+```
+
+
 ```
 make run
 ```
 
+
+
 #### TODO: improve Makefile