diff --git a/README.md b/README.md
index 97e0617..48530b6 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ A web-based tool for retrieving and converting GPS coordinates.
 
 ## Local development
 
-gpstool is developed using [Vite](https://vitejs.dev/) and [Svelte](https://svelte.dev/).
+gpstool is developed using [Vite](https://vitejs.dev/) and [Svelte](https://svelte.dev/), and uses [Leaflet](https://leafletjs.com/) to render the map tiles from [OpenStreetMap](https://www.openstreetmap.org/).
 
 ```bash
 npm install