diff --git a/README.md b/README.md
index 4d00acd..6c02340 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,10 @@ This map shows all the blinking beacons from [OpenStreetMap](https://www.openstr
 
 More specifically, it asks the [Overpass API](https://www.overpass-api.de) for all elements with an `seamark:light:sequence` or `seamark:light:1:sequence` attribute, decodes these, and displays them as coloured circles on the map using [Leaflet](https://leafletjs.com). It also tries to take the `seamark:light:range` and `seamark:light:colour` into account.
 
+If you think a lighthouse or beacon is missing, please add or edit it on [OpenStreetMap](https://www.openstreetmap.org/). 
+
 ## Overpass API
-The current version uses an extracted dataset, but the code allows for directly querying the Overpass API. However, since a query like the one used here can take multiple minutes to complete it is not very useful do always do live queries.
+The current version uses an extracted dataset, but the code allows for directly querying the Overpass API. However, since a query like the one used here can take multiple minutes to complete it is not very useful do always do live queries. Currently we're updating the data every night.
 
 ## Useful stuff
 The `leaflet.indexedfeaturelayer.js` file contains an extension on Leaflet's GeoJSON layer that only add layers/features to the map that are (or are about to be) visible. It uses a spatial index to quickly query which features can be removed from the DOM, increasing performance.