diff --git a/homeassistant/components/twentemilieu/__init__.py b/homeassistant/components/twentemilieu/__init__.py
index 576ab2068a7..cee6ffbf38e 100644
--- a/homeassistant/components/twentemilieu/__init__.py
+++ b/homeassistant/components/twentemilieu/__init__.py
@@ -34,7 +34,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     )
 
     coordinator: DataUpdateCoordinator[
-        dict[WasteType, date | None]
+        dict[WasteType, list[date]]
     ] = DataUpdateCoordinator(
         hass,
         LOGGER,
diff --git a/homeassistant/components/twentemilieu/diagnostics.py b/homeassistant/components/twentemilieu/diagnostics.py
index 0d63fdbcf2c..a158ead0909 100644
--- a/homeassistant/components/twentemilieu/diagnostics.py
+++ b/homeassistant/components/twentemilieu/diagnostics.py
@@ -17,6 +17,6 @@ async def async_get_config_entry_diagnostics(
     """Return diagnostics for a config entry."""
     coordinator: DataUpdateCoordinator = hass.data[DOMAIN][entry.data[CONF_ID]]
     return {
-        waste_type: waste_date.isoformat() if waste_date else None
-        for waste_type, waste_date in coordinator.data.items()
+        waste_type: [waste_date.isoformat() for waste_date in waste_dates]
+        for waste_type, waste_dates in coordinator.data.items()
     }
diff --git a/homeassistant/components/twentemilieu/manifest.json b/homeassistant/components/twentemilieu/manifest.json
index d0b94efe289..e8e280dcd3d 100644
--- a/homeassistant/components/twentemilieu/manifest.json
+++ b/homeassistant/components/twentemilieu/manifest.json
@@ -3,7 +3,7 @@
   "name": "Twente Milieu",
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/twentemilieu",
-  "requirements": ["twentemilieu==0.5.0"],
+  "requirements": ["twentemilieu==0.6.0"],
   "codeowners": ["@frenck"],
   "quality_scale": "platinum",
   "iot_class": "cloud_polling",
diff --git a/homeassistant/components/twentemilieu/sensor.py b/homeassistant/components/twentemilieu/sensor.py
index f25b84ace15..a56523d53d0 100644
--- a/homeassistant/components/twentemilieu/sensor.py
+++ b/homeassistant/components/twentemilieu/sensor.py
@@ -90,11 +90,10 @@ async def async_setup_entry(
     )
 
 
-class TwenteMilieuSensor(CoordinatorEntity, SensorEntity):
+class TwenteMilieuSensor(CoordinatorEntity[dict[WasteType, list[date]]], SensorEntity):
     """Defines a Twente Milieu sensor."""
 
     entity_description: TwenteMilieuSensorDescription
-    coordinator: DataUpdateCoordinator[dict[WasteType, date | None]]
 
     def __init__(
         self,
@@ -117,4 +116,6 @@ class TwenteMilieuSensor(CoordinatorEntity, SensorEntity):
     @property
     def native_value(self) -> date | None:
         """Return the state of the sensor."""
-        return self.coordinator.data.get(self.entity_description.waste_type)
+        if not (dates := self.coordinator.data[self.entity_description.waste_type]):
+            return None
+        return dates[0]
diff --git a/requirements_all.txt b/requirements_all.txt
index fc930536b83..5b63119186d 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2315,7 +2315,7 @@ ttls==1.4.3
 tuya-iot-py-sdk==0.6.6
 
 # homeassistant.components.twentemilieu
-twentemilieu==0.5.0
+twentemilieu==0.6.0
 
 # homeassistant.components.twilio
 twilio==6.32.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 8f39d58d637..0a13b5c2686 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1468,7 +1468,7 @@ ttls==1.4.3
 tuya-iot-py-sdk==0.6.6
 
 # homeassistant.components.twentemilieu
-twentemilieu==0.5.0
+twentemilieu==0.6.0
 
 # homeassistant.components.twilio
 twilio==6.32.0
diff --git a/tests/components/twentemilieu/conftest.py b/tests/components/twentemilieu/conftest.py
index 530e9723251..6e58ba2db48 100644
--- a/tests/components/twentemilieu/conftest.py
+++ b/tests/components/twentemilieu/conftest.py
@@ -65,11 +65,11 @@ def mock_twentemilieu() -> Generator[None, MagicMock, None]:
         twentemilieu = twentemilieu_mock.return_value
         twentemilieu.unique_id.return_value = 12345
         twentemilieu.update.return_value = {
-            WasteType.NON_RECYCLABLE: date(2021, 11, 1),
-            WasteType.ORGANIC: date(2021, 11, 2),
-            WasteType.PACKAGES: date(2021, 11, 3),
-            WasteType.PAPER: None,
-            WasteType.TREE: date(2022, 1, 6),
+            WasteType.NON_RECYCLABLE: [date(2021, 11, 1), date(2021, 12, 1)],
+            WasteType.ORGANIC: [date(2021, 11, 2)],
+            WasteType.PACKAGES: [date(2021, 11, 3)],
+            WasteType.PAPER: [],
+            WasteType.TREE: [date(2022, 1, 6)],
         }
         yield twentemilieu
 
diff --git a/tests/components/twentemilieu/test_diagnostics.py b/tests/components/twentemilieu/test_diagnostics.py
index 2f5ffcd5eb9..efbe2fc3104 100644
--- a/tests/components/twentemilieu/test_diagnostics.py
+++ b/tests/components/twentemilieu/test_diagnostics.py
@@ -16,9 +16,9 @@ async def test_diagnostics(
     assert await get_diagnostics_for_config_entry(
         hass, hass_client, init_integration
     ) == {
-        "0": "2021-11-01",
-        "1": "2021-11-02",
-        "2": None,
-        "6": "2022-01-06",
-        "10": "2021-11-03",
+        "0": ["2021-11-01", "2021-12-01"],
+        "1": ["2021-11-02"],
+        "2": [],
+        "6": ["2022-01-06"],
+        "10": ["2021-11-03"],
     }