diff --git a/lib/tocify.js b/lib/tocify.js
index f36abbd..b9fa6a7 100644
--- a/lib/tocify.js
+++ b/lib/tocify.js
@@ -2,7 +2,7 @@
 /* eslint-disable no-cond-assign */
 
 const marked = require('marked')
-const normalize = require('path').normalize
+const path = require('path')
 const stripMarkdown = require('./helpers/strip_markdown')
 const assign = Object.assign
 
@@ -216,8 +216,8 @@ function anchorize (source) {
  */
 
 function absolutify (source, root) {
-  if (source.substr(0, 1) !== '/') {
-    source = normalize(root + '/' + source)
+  if (source.substr(0, 1) !== path.sep) {
+    source = path.normalize(path.join(root, source))
   }
   source = source.replace(/^\//, '')
   return { source }