diff --git a/hassio/api/proxy.py b/hassio/api/proxy.py
index 9b25ec618..3cbc35cf5 100644
--- a/hassio/api/proxy.py
+++ b/hassio/api/proxy.py
@@ -4,7 +4,7 @@ import logging
 
 import aiohttp
 from aiohttp import web
-from aiohttp.web_exceptions import HTTPBadGateway
+from aiohttp.web_exceptions import HTTPBadGateway, HTTPInternalServerError
 from aiohttp.hdrs import CONTENT_TYPE
 import async_timeout
 
@@ -100,7 +100,7 @@ class APIProxy(CoreSysAttributes):
 
     async def _websocket_client(self):
         """Initialize a websocket api connection."""
-        url = f"{self.homeassistant.api_url}/api/websocket"
+        url = f"{self._homeassistant.api_url}/api/websocket"
 
         try:
             client = await self._websession_ssl.ws_connect(
@@ -133,9 +133,19 @@ class APIProxy(CoreSysAttributes):
         await server.prepare(request)
 
         # handle authentication
-        await server.send_json({'type': 'auth_required'})
-        await server.receive_json()  # get internal token
-        await server.send_json({'type': 'auth_ok'})
+        try:
+            await server.send_json({
+                'type': 'auth_required',
+                'ha_version': self._homeassistant.version,
+            })
+            await server.receive_json()  # get internal token
+            await server.send_json({
+                'type': 'auth_ok',
+                'ha_version': self._homeassistant.version,
+            })
+        except (RuntimeError, ValueError) as err:
+            _LOGGER.error("Can't initialize handshake: %s", err)
+            raise HTTPInternalServerError() from None
 
         # init connection to hass
         client = await self._websocket_client()
diff --git a/hassio/const.py b/hassio/const.py
index 23ec877aa..cdd9f3d47 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -2,7 +2,7 @@
 from pathlib import Path
 from ipaddress import ip_network
 
-HASSIO_VERSION = '0.84'
+HASSIO_VERSION = '0.85'
 
 URL_HASSIO_VERSION = ('https://raw.githubusercontent.com/home-assistant/'
                       'hassio/{}/version.json')
diff --git a/version.json b/version.json
index b07176f65..fd5f4699a 100644
--- a/version.json
+++ b/version.json
@@ -1,5 +1,5 @@
 {
-    "hassio": "0.84",
+    "hassio": "0.85",
     "homeassistant": "0.62.0",
     "resinos": "1.1",
     "resinhup": "0.3",