diff --git a/homeassistant/components/sonos/config_flow.py b/homeassistant/components/sonos/config_flow.py
index 59788d17a92..e6d2bb337b8 100644
--- a/homeassistant/components/sonos/config_flow.py
+++ b/homeassistant/components/sonos/config_flow.py
@@ -1,5 +1,5 @@
 """Config flow for SONOS."""
-from typing import cast
+import dataclasses
 
 import soco
 
@@ -30,13 +30,13 @@ class SonosDiscoveryFlowHandler(DiscoveryFlowHandler):
         self, discovery_info: zeroconf.ZeroconfServiceInfo
     ) -> FlowResult:
         """Handle a flow initialized by zeroconf."""
-        hostname = discovery_info[zeroconf.ATTR_HOSTNAME]
+        hostname = discovery_info.hostname
         if hostname is None or not hostname.lower().startswith("sonos"):
             return self.async_abort(reason="not_sonos_device")
         await self.async_set_unique_id(self._domain, raise_on_progress=False)
-        host = discovery_info[zeroconf.ATTR_HOST]
-        mdns_name = discovery_info[zeroconf.ATTR_NAME]
-        properties = discovery_info[zeroconf.ATTR_PROPERTIES]
+        host = discovery_info.host
+        mdns_name = discovery_info.name
+        properties = discovery_info.properties
         boot_seqnum = properties.get("bootseq")
         model = properties.get("model")
         uid = hostname_to_uid(hostname)
@@ -44,7 +44,7 @@ class SonosDiscoveryFlowHandler(DiscoveryFlowHandler):
             discovery_manager.async_discovered_player(
                 "Zeroconf", properties, host, uid, boot_seqnum, model, mdns_name
             )
-        return await self.async_step_discovery(cast(dict, discovery_info))
+        return await self.async_step_discovery(dataclasses.asdict(discovery_info))
 
 
 config_entries.HANDLERS.register(DOMAIN)(SonosDiscoveryFlowHandler)