apply jittering to outliers data in a boxplot with ggplot2

do you have any idea of how to apply jittering just to the outliers data of a boxplot? This is the code:

ggplot(data = a, aes(x = "", y = a$V8)) +
geom_boxplot(outlier.size = 0.5)+
geom_point(data=a, aes(x="", y=a$V8[54]), colour="red", size=3) + 
theme_bw()+
coord_flip()

thank you!!