how to change font style of text

[onisaint]

how can i change the fontFamily of the text rendered ??
i tried this

const mdStyle = StyleSheet.create({
  heading: {
    borderBottomWidth: 1,
    fontFamily: 'Metropolis-SemiBold',
  },
  heading1: {
    backgroundColor: '#000000',
    color: '#FFFFFF',
    fontFamily: 'Metropolis-SemiBold',
  },
  heading2: {
    fontFamily: 'Metropolis-SemiBold',
  },
  heading3: {
    fontFamily: 'Metropolis-SemiBold',
  },
  heading4: {
    fontFamily: 'Metropolis-SemiBold',
  },
  heading5: {
    fontFamily: 'Metropolis-SemiBold',
  },
  heading6: {
    fontFamily: 'Metropolis-SemiBold',
  },
  strong: {
    fontFamily: 'Metropolis-SemiBold',
    color: theme.shades.cement,
  },
  text: {
    fontFamily: 'Metropolis-Regular',
    color: theme.shades.cement,
  },
});

RN = 0.59.8
react = 16.8.3
native markdown = 3.2.8

[Merciful12]

maybe it can help you https://github.com/mientjan/react-native-markdown-renderer/blob/master/src/lib/styles.js

[Villar74]

not working for me also( even when i set rules for render