diff --git a/homeassistant/components/sfr_box/diagnostics.py b/homeassistant/components/sfr_box/diagnostics.py
index 1fb98053267937..e0e84a7ec1a204 100644
--- a/homeassistant/components/sfr_box/diagnostics.py
+++ b/homeassistant/components/sfr_box/diagnostics.py
@@ -27,16 +27,28 @@ async def async_get_config_entry_diagnostics(
         },
         "data": {
             "dsl": async_redact_data(
-                dataclasses.asdict(await data.system.box.dsl_get_info()), TO_REDACT
+                dataclasses.asdict(
+                    await data.system.box.dsl_get_info()  # type:ignore [call-overload]
+                ),
+                TO_REDACT,
             ),
             "ftth": async_redact_data(
-                dataclasses.asdict(await data.system.box.ftth_get_info()), TO_REDACT
+                dataclasses.asdict(
+                    await data.system.box.ftth_get_info()  # type:ignore [call-overload]
+                ),
+                TO_REDACT,
             ),
             "system": async_redact_data(
-                dataclasses.asdict(await data.system.box.system_get_info()), TO_REDACT
+                dataclasses.asdict(
+                    await data.system.box.system_get_info()  # type:ignore [call-overload]
+                ),
+                TO_REDACT,
             ),
             "wan": async_redact_data(
-                dataclasses.asdict(await data.system.box.wan_get_info()), TO_REDACT
+                dataclasses.asdict(
+                    await data.system.box.wan_get_info()  # type:ignore [call-overload]
+                ),
+                TO_REDACT,
             ),
         },
     }
diff --git a/homeassistant/components/sfr_box/manifest.json b/homeassistant/components/sfr_box/manifest.json
index eb3c9cb1b68c94..bf4d91a50f154d 100644
--- a/homeassistant/components/sfr_box/manifest.json
+++ b/homeassistant/components/sfr_box/manifest.json
@@ -6,5 +6,5 @@
   "documentation": "https://www.home-assistant.io/integrations/sfr_box",
   "integration_type": "device",
   "iot_class": "local_polling",
-  "requirements": ["sfrbox-api==0.0.6"]
+  "requirements": ["sfrbox-api==0.0.8"]
 }
diff --git a/homeassistant/components/sfr_box/sensor.py b/homeassistant/components/sfr_box/sensor.py
index 1c4540b1c74c3a..f56a97656183bc 100644
--- a/homeassistant/components/sfr_box/sensor.py
+++ b/homeassistant/components/sfr_box/sensor.py
@@ -188,7 +188,7 @@ class SFRBoxSensorEntityDescription(SensorEntityDescription, SFRBoxSensorMixin[_
         entity_category=EntityCategory.DIAGNOSTIC,
         entity_registry_enabled_default=False,
         native_unit_of_measurement=UnitOfTemperature.CELSIUS,
-        value_fn=lambda x: x.temperature / 1000,
+        value_fn=lambda x: None if x.temperature is None else x.temperature / 1000,
     ),
 )
 WAN_SENSOR_TYPES: tuple[SFRBoxSensorEntityDescription[WanInfo], ...] = (
diff --git a/requirements_all.txt b/requirements_all.txt
index ab9ad78eb4caa1..4ec59bce2e1162 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2436,7 +2436,7 @@ sensorpush-ble==1.5.5
 sentry-sdk==1.37.1
 
 # homeassistant.components.sfr_box
-sfrbox-api==0.0.6
+sfrbox-api==0.0.8
 
 # homeassistant.components.sharkiq
 sharkiq==1.0.2
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 6e96559f180e44..3203a8e87ce43d 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1815,7 +1815,7 @@ sensorpush-ble==1.5.5
 sentry-sdk==1.37.1
 
 # homeassistant.components.sfr_box
-sfrbox-api==0.0.6
+sfrbox-api==0.0.8
 
 # homeassistant.components.sharkiq
 sharkiq==1.0.2