How to increase the width of the median line in boxplot using ggplot2 in R?

The default width of the median line is wider than the rest of the lines that represent minimum, first quartile, third quartile or maximum but we can make it a little wider to make it more appealing. This can be done with the help of fatten argument inside geom_boxplot function, the default value of fatten is 2.

Example

ggplot(df,aes(x,y))+geom_boxplot(fatten=6)

Output