History Graph Card not updating

I created a History Graph card to show the output from a DHT11 sensor but the graph does not update unless I edit the card. and then click “save”.
This is my config for the card…

entities: 2

- entity: sensor.inside_temperature

3- entity: sensor.inside_humidity

4- entity: sensor.outside_temperature

5- entity: sensor.outside_humidity

6 hours_to_show: 48

7 refresh_interval: 60

8 title: Temp and Humidity

9 type: history-graph


​It updates when I refresh the page though.

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