Heatplot label_format does not work

Hello,

I am trying to produce a heatmap of DE genes using enrichplot's heatplot like below.

heatplot(ego,showCategory = 50,foldChange=geneList, label_format=200)

But label_format is not recognized. What is the problem? Is it a bug and how to solve it? I have enrichplot version 1.13.1.992

Error in heatplot(ego, showCategory = 50, foldChange = geneList, label_format = 200) : 
      unused argument (label_format = 200)

My problem is when the GO term name is long, the label on the axis is divided in 2 lines which overwrite itselves, while I want one single line.