diff --git a/.env.sample b/.env.sample
index 63ffb04..ea29f59 100644
--- a/.env.sample
+++ b/.env.sample
@@ -5,6 +5,9 @@
 # (Make sure the /api and https:// is included in the endpoint)
 TIMETABLE_ENDPOINT=
 TIMETABLE_TOKEN=
+# How often should the script query for timetable updates
+# Default: 60000 (every minute)
+TIMETABLE_INTERVAL=
 
 # Set the Matrix url, bot user name and auth token here
 MATRIX_URL=
diff --git a/index.js b/index.js
index f71d6c0..eef4e70 100644
--- a/index.js
+++ b/index.js
@@ -126,7 +126,7 @@ setInterval(async () => {
       client.sendHtmlMessage(roomId, plainText(message), message);
     }
   }
-}, 1000);
+}, process.env.TIMETABLE_INTERVAL || 1000 * 60);
 
 // Handle events
 client.on("Room.timeline", async function (event, room) {