diff --git a/vona/federation/__init__.py b/vona/federation/__init__.py
index 93b2889..abeb009 100644
--- a/vona/federation/__init__.py
+++ b/vona/federation/__init__.py
@@ -440,10 +440,10 @@ def invite_user(data):
 
 	if "event" in invite_data:
 		if "room_version" in invite_data:
-			if invite_data["room_version"] != "2":
+			if invite_data["room_version"] not in ["1", "2"]:
 				return jsonify({
 					"errcode": "M_INCOMPATIBLE_ROOM_VERSION",
-					"error": "Vona only supports room version 2.",
+					"error": "Unsupported room version",
 					"room_version": invite_data["room_version"]
 				}), 400
 
@@ -459,7 +459,10 @@ def invite_user(data):
 				and content["membership"] == "invite"
 				and event["state_key"] == f"@vona:{server_name}"
 			):
-				return jsonify({"event": globals.sign_json_without_discard(invite_data["event"]), "room_version": "2"})
+				return jsonify({
+					"event": globals.sign_json_without_discard(invite_data["event"]),
+					"room_version": invite_data["room_version"]
+				})
 
 
 	return jsonify({