diff --git a/homeassistant/components/smarla/number.py b/homeassistant/components/smarla/number.py
index c1a236e4557..b20afe8ae68 100644
--- a/homeassistant/components/smarla/number.py
+++ b/homeassistant/components/smarla/number.py
@@ -15,6 +15,8 @@ from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from . import FederwiegeConfigEntry
 from .entity import SmarlaBaseEntity, SmarlaEntityDescription
 
+PARALLEL_UPDATES = 0
+
 
 @dataclass(frozen=True, kw_only=True)
 class SmarlaNumberEntityDescription(SmarlaEntityDescription, NumberEntityDescription):
diff --git a/homeassistant/components/smarla/quality_scale.yaml b/homeassistant/components/smarla/quality_scale.yaml
index 99b6e0c608c..3f85577576c 100644
--- a/homeassistant/components/smarla/quality_scale.yaml
+++ b/homeassistant/components/smarla/quality_scale.yaml
@@ -27,7 +27,7 @@ rules:
   entity-unavailable: todo
   integration-owner: done
   log-when-unavailable: todo
-  parallel-updates: todo
+  parallel-updates: done
   reauthentication-flow: todo
   test-coverage: done
 
diff --git a/homeassistant/components/smarla/sensor.py b/homeassistant/components/smarla/sensor.py
index 18bef76e320..887bccf2e8c 100644
--- a/homeassistant/components/smarla/sensor.py
+++ b/homeassistant/components/smarla/sensor.py
@@ -16,6 +16,8 @@ from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from . import FederwiegeConfigEntry
 from .entity import SmarlaBaseEntity, SmarlaEntityDescription
 
+PARALLEL_UPDATES = 0
+
 
 @dataclass(frozen=True, kw_only=True)
 class SmarlaSensorEntityDescription(SmarlaEntityDescription, SensorEntityDescription):
diff --git a/homeassistant/components/smarla/switch.py b/homeassistant/components/smarla/switch.py
index f9b56fdea7e..d1cbb1364c4 100644
--- a/homeassistant/components/smarla/switch.py
+++ b/homeassistant/components/smarla/switch.py
@@ -12,6 +12,8 @@ from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from . import FederwiegeConfigEntry
 from .entity import SmarlaBaseEntity, SmarlaEntityDescription
 
+PARALLEL_UPDATES = 0
+
 
 @dataclass(frozen=True, kw_only=True)
 class SmarlaSwitchEntityDescription(SmarlaEntityDescription, SwitchEntityDescription):