diff --git a/dingtalk_stream/stream.py b/dingtalk_stream/stream.py
index 9f01fa6..1b34d6f 100644
--- a/dingtalk_stream/stream.py
+++ b/dingtalk_stream/stream.py
@@ -70,7 +70,7 @@ async def start(self):
                     continue
                 self.logger.info('endpoint is %s', connection)
 
-                uri = f"{connection["endpoint"]}?ticket={quote_plus(connection["ticket"])}"
+                uri = f'{connection["endpoint"]}?ticket={quote_plus(connection["ticket"])}'
                 async with websockets.connect(uri) as websocket:
                     self.websocket = websocket
                     asyncio.create_task(self.keepalive(websocket))
diff --git a/dingtalk_stream/version.py b/dingtalk_stream/version.py
index 59c4df7..5856c71 100644
--- a/dingtalk_stream/version.py
+++ b/dingtalk_stream/version.py
@@ -1 +1 @@
-VERSION_STRING = '0.24.1'
+VERSION_STRING = '0.24.2'