i am working on data map visualization project right now

i put labels on my map with go.Scattermapbox

and i want to change font type

when i add family="Arial" to my code all labels dissapear

how to change my font type is there any ways ?

fig.add_trace(go.Scattermapbox(
    lat=city_avg_price['lat'],
    lon=city_avg_price['lon'],
    mode='text',
    text=city_avg_price['label'].tolist(),
    textposition="middle center",
    textfont=dict(
        size=12, 
        color="black",
        family="Arial"  # Here is my font
    ),
    showlegend=False
))

i tried to add family="Arial" to my textfont=dict() but it didnt help out all the labels dissapeared