diff --git a/from_wiki_osm.ts b/from_wiki_osm.ts
index 3baf9a7..461a91f 100644
--- a/from_wiki_osm.ts
+++ b/from_wiki_osm.ts
@@ -3,3 +3,4 @@
 
 
 // take events from https://osmcal.org/
+// https://osmcal.org/static/api.html api doc