diff --git a/index.js b/index.js
index 937f713..cc769de 100644
--- a/index.js
+++ b/index.js
@@ -9,29 +9,29 @@ module.exports = remark2retext;
  * with the new NLCST tree (bridge-mode).
  * If a parser is given, returns the NLCST tree: further
  * plug-ins run on that tree (mutate-mode). */
-function remark2retext(destination) {
+function remark2retext(destination, options) {
   var fn = destination && destination.run ? bridge : mutate;
-  return fn(destination);
+  return fn(destination, options);
 }
 
 /* Mutate-mode.  Further transformers run on the NLCST tree. */
-function mutate(parser) {
+function mutate(parser, options) {
   return transformer;
   function transformer(node, file) {
-    return mdast2nlcst(node, file, parser);
+    return mdast2nlcst(node, file, parser, options);
   }
 }
 
 /* Bridge-mode.  Runs the destination with the new NLCST
  * tree. */
-function bridge(destination) {
+function bridge(destination, options) {
   return transformer;
   function transformer(node, file, next) {
     var Parser = destination.freeze().Parser;
-    var tree = mdast2nlcst(node, file, Parser);
-
-    destination.run(tree, file, function (err) {
+    var tree = mdast2nlcst(node, file, Parser, options);
+    destination.run(tree, file, done);
+    function done(err) {
       next(err);
-    });
+    }
   }
 }
diff --git a/package.json b/package.json
index 92487cc..e14c48a 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "index.js"
   ],
   "dependencies": {
-    "mdast-util-to-nlcst": "^3.0.0"
+    "mdast-util-to-nlcst": "^3.2.0"
   },
   "devDependencies": {
     "browserify": "^14.0.0",
diff --git a/readme.md b/readme.md
index e619e37..b0271a2 100644
--- a/readme.md
+++ b/readme.md
@@ -50,7 +50,7 @@ example.md
 
 ## API
 
-### `origin.use(remark2retext, destination)`
+### `origin.use(remark2retext, destination[, options])`
 
 Either bridge or mutate from [**remark**][remark] ([MDAST][]) to
 [**retext**][retext] ([NLCST][]).
@@ -68,6 +68,10 @@ If a parser (such as [**parse-latin**][latin], [**parse-english**][english],
 or [**parse-dutch**][dutch]) is given, passes the tree to further
 plug-ins (mutate-mode).
 
+###### `options`
+
+Passed to [`mdast-util-to-nlcst`][to-nlcst].
+
 ## Related
 
 *   [`rehype-retext`](https://github.com/wooorm/rehype-retext)
@@ -76,6 +80,8 @@ plug-ins (mutate-mode).
     — Transform markdown to HTML
 *   [`rehype-remark`](https://github.com/wooorm/rehype-remark)
     — Transform HTML to markdown
+*   [`mdast-util-to-nlcst`][to-nlcst]
+    — Underlying algorithm
 
 ## License
 
@@ -114,3 +120,5 @@ plug-ins (mutate-mode).
 [english]: https://github.com/wooorm/parse-english
 
 [dutch]: https://github.com/wooorm/parse-dutch
+
+[to-nlcst]: https://github.com/syntax-tree/mdast-util-to-nlcst