diff --git a/README.md b/README.md
index 1e1c6ce..1f003eb 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ The integration calculates the set of hours that will give the lowest price, by
 
 ## Requirements
 - The [Nordpool](https://github.com/custom-components/nordpool), the [Energi Data Service](https://github.com/MTrab/energidataservice), the [Entso-e](https://github.com/JaccoR/hass-entso-e) integration or a template sensor that generates price data using the supported [generic price format](https://github.com/jonasbkarlsson/ev_smart_charging/wiki/Price-sensor).
-- Home Assistant version 2022.7 or newer.
+- Home Assistant version 2023.4 or newer.
 
 ## Features
 - Automatic EV charging control based on electrity prices.
@@ -109,15 +109,15 @@ The sensor `sensor.ev_smart_charging_charging` has the following attributes.
 
 Attribute | Description
 -- | --
-`Current price` | The current price from the electricity price entity.
-`EV SOC` | The current SOC of the electric vehicle, as reported by the EV SOC entity.
-`EV target SOC` | The target SOC of the electric vehicle, as reported by the EV target SOC entity.
-`Charging is planned` | `true` if charging is planned, otherwise `false`. Is set to `false` after charging is completed.
-`Charging start time` | If charging is planned, the date and time when the charging will start.
-`Charging stop time` | If charging is planned, the date and time when the charging will stop.
-`Charging number of hours` | If charging is planned, the number of hours that charging will be done. This might be less than the number of hours between the start and stop times, if the `apply_price_limit` switch is activated.
-`Raw two days` | The electricty price today and tomorrow from the electricity price entity.
-`Charging schedule` | The calculated charging schedule. Can be used by an ApexCharts card to visulize the planned charging, see below.
+`current_price` | The current price from the electricity price entity.
+`ev_soc` | The current SOC of the electric vehicle, as reported by the EV SOC entity.
+`ev_target_soc` | The target SOC of the electric vehicle, as reported by the EV target SOC entity.
+`charging_is_planned` | `true` if charging is planned, otherwise `false`. Is set to `false` after charging is completed.
+`charging_start_time` | If charging is planned, the date and time when the charging will start.
+`charging_stop_time` | If charging is planned, the date and time when the charging will stop.
+`charging_number_of_hours` | If charging is planned, the number of hours that charging will be done. This might be less than the number of hours between the start and stop times, if the `apply_price_limit` switch is activated.
+`raw_two_days` | The electricty price today and tomorrow from the electricity price entity.
+`charging_schedule` | The calculated charging schedule. Can be used by an ApexCharts card to visulize the planned charging, see below.
 
 ## Lovelace UI