diff --git a/Roadmap.md b/Roadmap.md
index a8dfc01..8a9b706 100644
--- a/Roadmap.md
+++ b/Roadmap.md
@@ -1,4 +1,5 @@
 * (done) Architecture for base types, map, renderers (excluding vector rendering), tile layers and sources, interactions, controls and overlays.
+* (done) Basic tile layer types (OSM etc.).
 * (done) Basic map interactions and controls (zooming, dragging etc.).
 * (in progress) Implement more tile layer sources (WMS etc.).
 * (in progress) User facing API.