diff --git a/homeassistant/components/iron_os/number.py b/homeassistant/components/iron_os/number.py
index 9230faec1f1..2da80aac327 100644
--- a/homeassistant/components/iron_os/number.py
+++ b/homeassistant/components/iron_os/number.py
@@ -23,6 +23,8 @@ from . import IronOSConfigEntry
 from .const import DOMAIN, MAX_TEMP, MIN_TEMP
 from .entity import IronOSBaseEntity
 
+PARALLEL_UPDATES = 0
+
 
 @dataclass(frozen=True, kw_only=True)
 class IronOSNumberEntityDescription(NumberEntityDescription):
diff --git a/homeassistant/components/iron_os/update.py b/homeassistant/components/iron_os/update.py
index 786ba86f730..0da0786821e 100644
--- a/homeassistant/components/iron_os/update.py
+++ b/homeassistant/components/iron_os/update.py
@@ -15,6 +15,8 @@ from . import IRON_OS_KEY, IronOSConfigEntry, IronOSLiveDataCoordinator
 from .coordinator import IronOSFirmwareUpdateCoordinator
 from .entity import IronOSBaseEntity
 
+PARALLEL_UPDATES = 0
+
 UPDATE_DESCRIPTION = UpdateEntityDescription(
     key="firmware",
     device_class=UpdateDeviceClass.FIRMWARE,