diff --git a/custom_components/tibber_prices/coordinator/core.py b/custom_components/tibber_prices/coordinator/core.py
index 168e884..bfe40f4 100644
--- a/custom_components/tibber_prices/coordinator/core.py
+++ b/custom_components/tibber_prices/coordinator/core.py
@@ -739,7 +739,7 @@ class TibberPricesDataUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
             return {}
         return self._transform_data(self._cached_price_data)
 
-    def _get_threshold_percentages(self) -> dict[str, int]:
+    def _get_threshold_percentages(self) -> dict[str, int | float]:
         """Get threshold percentages from config options."""
         return self._data_transformer.get_threshold_percentages()
 
diff --git a/custom_components/tibber_prices/coordinator/data_transformation.py b/custom_components/tibber_prices/coordinator/data_transformation.py
index 2c62347..ab59125 100644
--- a/custom_components/tibber_prices/coordinator/data_transformation.py
+++ b/custom_components/tibber_prices/coordinator/data_transformation.py
@@ -223,7 +223,8 @@ class TibberPricesDataTransformer:
 
         if not should_retransform and has_cache:
             self._log("debug", "Using cached transformed data (no transformation needed)")
-            return self._cached_transformed_data
+            # has_cache ensures _cached_transformed_data is not None
+            return self._cached_transformed_data  # type: ignore[return-value]
 
         self._log("debug", "Transforming price data (enrichment + period calculation)")
 
diff --git a/custom_components/tibber_prices/sensor/core.py b/custom_components/tibber_prices/sensor/core.py
index 6dcfec6..5a6e4ba 100644
--- a/custom_components/tibber_prices/sensor/core.py
+++ b/custom_components/tibber_prices/sensor/core.py
@@ -221,7 +221,7 @@ class TibberPricesSensor(TibberPricesEntity, RestoreSensor):
             )
             # Modify _state_info to add dynamic exclusion
             if self._state_info is None:
-                self._state_info = {}
+                self._state_info = {"unrecorded_attributes": frozenset()}
             current_unrecorded = self._state_info.get("unrecorded_attributes", frozenset())
             # State shows median → exclude price_median from attributes
             # State shows mean → exclude price_mean from attributes