diff --git a/src/diagrams/flowchart/flowRenderer.js b/src/diagrams/flowchart/flowRenderer.js
index 28c010218..ae6b1caed 100644
--- a/src/diagrams/flowchart/flowRenderer.js
+++ b/src/diagrams/flowchart/flowRenderer.js
@@ -67,9 +67,7 @@ export const addVertices = function (vert, g) {
     let labelTypeStr = ''
     if (conf.htmlLabels) {
       labelTypeStr = 'html'
-      verticeText = verticeText.replace(/fa:fa[\w-]+/g, function (s) {
-        return '<i class="fa ' + s.substring(3) + '"></i>'
-      })
+      verticeText = verticeText.replace(/fa[lrsb]?:fa-[\w-]+/g, s => `<i class='${s.replace(':', ' ')}'></i>`)
       if (vertice.link) {
         verticeText = '<a href="' + vertice.link + '" rel="noopener">' + verticeText + '</a>'
       }