diff --git a/supervisor/hassos.py b/supervisor/hassos.py
index 87167013d..cd2fe9276 100644
--- a/supervisor/hassos.py
+++ b/supervisor/hassos.py
@@ -12,6 +12,7 @@ from .const import URL_HASSOS_OTA
 from .coresys import CoreSys, CoreSysAttributes
 from .dbus.rauc import RaucState
 from .exceptions import DBusError, HassOSNotSupportedError, HassOSUpdateError
+from .utils import process_lock
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
 
@@ -22,6 +23,7 @@ class HassOS(CoreSysAttributes):
     def __init__(self, coresys: CoreSys):
         """Initialize HassOS handler."""
         self.coresys: CoreSys = coresys
+        self.lock: asyncio.Lock = asyncio.Lock()
         self._available: bool = False
         self._version: Optional[str] = None
         self._board: Optional[str] = None
@@ -67,7 +69,7 @@ class HassOS(CoreSysAttributes):
 
         _LOGGER.info("Fetch OTA update from %s", url)
         try:
-            timeout = aiohttp.ClientTimeout(total=600)
+            timeout = aiohttp.ClientTimeout(total=60 * 60, connect=180)
             async with self.sys_websession.get(url, timeout=timeout) as request:
                 if request.status != 200:
                     raise HassOSUpdateError()
@@ -128,6 +130,7 @@ class HassOS(CoreSysAttributes):
         )
         return self.sys_host.services.restart("hassos-config.service")
 
+    @process_lock
     async def update(self, version: Optional[str] = None) -> None:
         """Update HassOS system."""
         version = version or self.latest_version