diff --git a/vona/federation/__init__.py b/vona/federation/__init__.py
index 998211b..e40cd6f 100644
--- a/vona/federation/__init__.py
+++ b/vona/federation/__init__.py
@@ -88,7 +88,7 @@ async def thumbnail_media(media_id):
 	}), 418
 
 
-@server.route("/_matrix/federation/v1/send_join/<room>/<eventId>", methods=["PUT"])
+@server.route("/_matrix/federation/v1/send_join/<room>/<path:eventId>", methods=["PUT"])
 async def send_join_v1(room, eventId):
 	if globals.room_version_from_id(room) not in ["1", "2"]:
 		return jsonify({
@@ -99,7 +99,7 @@ async def send_join_v1(room, eventId):
 	return jsonify([200, send_join(request, room)])
 
 
-@server.route("/_matrix/federation/v2/send_join/<room>/<eventId>", methods=["PUT"])
+@server.route("/_matrix/federation/v2/send_join/<room>/<path:eventId>", methods=["PUT"])
 async def send_join_v2(room, eventId):
 	return jsonify(send_join(request, room))