diff --git a/schemata/config-v1.json b/schemata/config-v1.json
index 68eff9f..bf5b358 100644
--- a/schemata/config-v1.json
+++ b/schemata/config-v1.json
@@ -5,9 +5,6 @@
 				"kind": {
 					"const": "cocoa",
 					"default": "cocoa",
-					"enum": [
-						"cocoa"
-					],
 					"title": "Kind",
 					"type": "string"
 				}
@@ -52,28 +49,14 @@
 		"WebsocketsReceiverConfig": {
 			"properties": {
 				"host": {
-					"anyOf": [
-						{
-							"format": "hostname",
-							"type": "string"
-						},
-						{
-							"items": {
-								"format": "hostname",
-								"type": "string"
-							},
-							"type": "array"
-						}
-					],
 					"description": "The hostname you'd like your WebSockets server to listen on. In most cases the default behaviour, which binds to all network interfaces, will be fine.",
-					"title": "Host"
+					"format": "hostname",
+					"title": "Host",
+					"type": "string"
 				},
 				"kind": {
 					"const": "websockets",
 					"default": "websockets",
-					"enum": [
-						"websockets"
-					],
 					"title": "Kind",
 					"type": "string"
 				},
diff --git a/schemata/playback-v1.json b/schemata/playback-v1.json
index 58b7244..29c2300 100644
--- a/schemata/playback-v1.json
+++ b/schemata/playback-v1.json
@@ -136,9 +136,6 @@
 						},
 						{
 							"const": "oneshot",
-							"enum": [
-								"oneshot"
-							],
 							"type": "string"
 						}
 					],
@@ -172,9 +169,6 @@
 						},
 						{
 							"const": "oneshot",
-							"enum": [
-								"oneshot"
-							],
 							"type": "string"
 						}
 					],
@@ -328,9 +322,6 @@
 				"state": {
 					"const": "stop",
 					"default": "stop",
-					"enum": [
-						"stop"
-					],
 					"title": "State",
 					"type": "string"
 				}
diff --git a/src/mpd_now_playable/config/model.py b/src/mpd_now_playable/config/model.py
index 0fde2d1..a112042 100644
--- a/src/mpd_now_playable/config/model.py
+++ b/src/mpd_now_playable/config/model.py
@@ -35,7 +35,7 @@ class WebsocketsReceiverConfig(BaseReceiverConfig):
 	#: The hostname you'd like your WebSockets server to listen on. In most
 	#: cases the default behaviour, which binds to all network interfaces, will
 	#: be fine.
-	host: Optional[Host | tuple[Host, ...]] = None
+	host: Optional[Host] = None
 
 
 ReceiverConfig = Annotated[
diff --git a/src/mpd_now_playable/receivers/websockets/receiver.py b/src/mpd_now_playable/receivers/websockets/receiver.py
index a125b6b..d218f35 100644
--- a/src/mpd_now_playable/receivers/websockets/receiver.py
+++ b/src/mpd_now_playable/receivers/websockets/receiver.py
@@ -2,7 +2,7 @@ from pathlib import Path
 
 import ormsgpack
 from websockets import broadcast
-from websockets.server import WebSocketServerProtocol, serve
+from websockets.asyncio.server import Server, ServerConnection, serve
 from yarl import URL
 
 from ...config.model import WebsocketsReceiverConfig
@@ -24,12 +24,11 @@ def default(value: object) -> object:
 class WebsocketsReceiver(Receiver):
 	config: WebsocketsReceiverConfig
 	player: Player
-	connections: set[WebSocketServerProtocol]
+	server: Server
 	last_status: bytes = MSGPACK_NULL
 
 	def __init__(self, config: WebsocketsReceiverConfig):
 		self.config = config
-		self.connections = set()
 
 	@classmethod
 	def loop_factory(cls) -> DefaultLoopFactory:
@@ -37,18 +36,14 @@ class WebsocketsReceiver(Receiver):
 
 	async def start(self, player: Player) -> None:
 		self.player = player
-		await serve(
+		self.server = await serve(
 			self.handle, host=self.config.host, port=self.config.port, reuse_port=True
 		)
 
-	async def handle(self, conn: WebSocketServerProtocol) -> None:
-		self.connections.add(conn)
+	async def handle(self, conn: ServerConnection) -> None:
 		await conn.send(self.last_status)
-		try:
-			await conn.wait_closed()
-		finally:
-			self.connections.remove(conn)
+		await conn.wait_closed()
 
 	async def update(self, playback: Playback) -> None:
 		self.last_status = ormsgpack.packb(playback, default=default)
-		broadcast(self.connections, self.last_status)
+		broadcast(self.server.connections, self.last_status)