diff --git a/index.js b/index.js
index cdcca93..c83c6e4 100644
--- a/index.js
+++ b/index.js
@@ -9,7 +9,8 @@ var defaultOptions = {
   className: 'anchor',
   // shamelessly borrowed from GitHub, thanks y'all
   linkIcon: '<svg aria-hidden="true" class="octicon octicon-link" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg>',
-  resetSlugger: true
+  resetSlugger: true,
+  headingLinksHref: slug => `#${slug}`
 }
 
 function plugin (md, _opts) {
@@ -58,7 +59,7 @@ function plugin (md, _opts) {
       // add some link attributes
       linkOpen.attrSet('id', options.prefix + postfix)
       linkOpen.attrSet('class', options.className)
-      linkOpen.attrSet('href', '#' + postfix)
+      linkOpen.attrSet('href', options.headingLinksHref(postfix))
       linkOpen.attrSet('aria-hidden', 'true')
 
       // add new token objects as children of heading