diff --git a/index.js b/index.js
index 9011f4e..45609b9 100644
--- a/index.js
+++ b/index.js
@@ -1,62 +1,19 @@
 'use strict'
 
-var matters = require('./lib/matters')
-var parse = require('./lib/parse')
-var compile = require('./lib/compile')
+var syntax = require('micromark-extension-frontmatter')
+var fromMarkdown = require('mdast-util-frontmatter/from-markdown')
+var toMarkdown = require('mdast-util-frontmatter/to-markdown')
 
 module.exports = frontmatter
 
 function frontmatter(options) {
-  var parser = this.Parser
-  var compiler = this.Compiler
-  var config = matters(options || ['yaml'])
-
-  if (isRemarkParser(parser)) {
-    attachParser(parser, config)
-  }
-
-  if (isRemarkCompiler(compiler)) {
-    attachCompiler(compiler, config)
-  }
-}
-
-function attachParser(parser, matters) {
-  var proto = parser.prototype
-  var tokenizers = wrap(parse, matters)
-  var names = []
-  var key
-
-  for (key in tokenizers) {
-    names.push(key)
+  var data = this.data()
+  add('micromarkExtensions', syntax(options))
+  add('fromMarkdownExtensions', fromMarkdown(options))
+  add('toMarkdownExtensions', toMarkdown(options))
+  function add(field, value) {
+    /* istanbul ignore if - other extensions. */
+    if (data[field]) data[field].push(value)
+    else data[field] = [value]
   }
-
-  proto.blockMethods = names.concat(proto.blockMethods)
-  proto.blockTokenizers = Object.assign({}, tokenizers, proto.blockTokenizers)
-}
-
-function attachCompiler(compiler, matters) {
-  var proto = compiler.prototype
-  proto.visitors = Object.assign({}, wrap(compile, matters), proto.visitors)
-}
-
-function wrap(func, matters) {
-  var result = {}
-  var length = matters.length
-  var index = -1
-  var tuple
-
-  while (++index < length) {
-    tuple = func(matters[index])
-    result[tuple[0]] = tuple[1]
-  }
-
-  return result
-}
-
-function isRemarkParser(parser) {
-  return Boolean(parser && parser.prototype && parser.prototype.blockTokenizers)
-}
-
-function isRemarkCompiler(compiler) {
-  return Boolean(compiler && compiler.prototype && compiler.prototype.visitors)
 }
diff --git a/lib/compile.js b/lib/compile.js
deleted file mode 100644
index 109b6ea..0000000
--- a/lib/compile.js
+++ /dev/null
@@ -1,19 +0,0 @@
-'use strict'
-
-var fence = require('./fence')
-
-module.exports = create
-
-function create(matter) {
-  var type = matter.type
-  var open = fence(matter, 'open')
-  var close = fence(matter, 'close')
-
-  frontmatter.displayName = type + 'FrontMatter'
-
-  return [type, frontmatter]
-
-  function frontmatter(node) {
-    return open + (node.value ? '\n' + node.value : '') + '\n' + close
-  }
-}
diff --git a/lib/fence.js b/lib/fence.js
deleted file mode 100644
index 9e80c48..0000000
--- a/lib/fence.js
+++ /dev/null
@@ -1,18 +0,0 @@
-'use strict'
-
-module.exports = fence
-
-function fence(matter, prop) {
-  var marker
-
-  if (matter.marker) {
-    marker = pick(matter.marker, prop)
-    return marker + marker + marker
-  }
-
-  return pick(matter.fence, prop)
-}
-
-function pick(schema, prop) {
-  return typeof schema === 'string' ? schema : schema[prop]
-}
diff --git a/lib/matters.js b/lib/matters.js
deleted file mode 100644
index 543998d..0000000
--- a/lib/matters.js
+++ /dev/null
@@ -1,55 +0,0 @@
-'use strict'
-
-var fault = require('fault')
-
-module.exports = matters
-
-var own = {}.hasOwnProperty
-
-var markers = {
-  yaml: '-',
-  toml: '+'
-}
-
-function matters(options) {
-  var results = []
-  var index = -1
-  var length
-
-  // One preset or matter.
-  if (typeof options === 'string' || !('length' in options)) {
-    options = [options]
-  }
-
-  length = options.length
-
-  while (++index < length) {
-    results[index] = matter(options[index])
-  }
-
-  return results
-}
-
-function matter(option) {
-  var result = option
-
-  if (typeof result === 'string') {
-    if (!own.call(markers, result)) {
-      throw fault('Missing matter definition for `%s`', result)
-    }
-
-    result = {type: result, marker: markers[result]}
-  } else if (typeof result !== 'object') {
-    throw fault('Expected matter to be an object, not `%j`', result)
-  }
-
-  if (!own.call(result, 'type')) {
-    throw fault('Missing `type` in matter `%j`', result)
-  }
-
-  if (!own.call(result, 'fence') && !own.call(result, 'marker')) {
-    throw fault('Missing `marker` or `fence` in matter `%j`', result)
-  }
-
-  return result
-}
diff --git a/lib/parse.js b/lib/parse.js
deleted file mode 100644
index 2852983..0000000
--- a/lib/parse.js
+++ /dev/null
@@ -1,46 +0,0 @@
-'use strict'
-
-var fence = require('./fence')
-
-module.exports = create
-
-function create(matter) {
-  var name = matter.type + 'FrontMatter'
-  var open = fence(matter, 'open')
-  var close = fence(matter, 'close')
-  var newline = '\n'
-  var anywhere = matter.anywhere
-
-  frontmatter.displayName = name
-  frontmatter.onlyAtStart = typeof anywhere === 'boolean' ? !anywhere : true
-
-  return [name, frontmatter]
-
-  function frontmatter(eat, value, silent) {
-    var index = open.length
-    var offset
-
-    if (value.slice(0, index) !== open || value.charAt(index) !== newline) {
-      return
-    }
-
-    offset = value.indexOf(close, index)
-
-    while (offset !== -1 && value.charAt(offset - 1) !== newline) {
-      index = offset + close.length
-      offset = value.indexOf(close, index)
-    }
-
-    if (offset !== -1) {
-      /* istanbul ignore if - never used (yet) */
-      if (silent) {
-        return true
-      }
-
-      return eat(value.slice(0, offset + close.length))({
-        type: matter.type,
-        value: value.slice(open.length + 1, offset - 1)
-      })
-    }
-  }
-}
diff --git a/package.json b/package.json
index 5483d7d..010fd70 100644
--- a/package.json
+++ b/package.json
@@ -28,12 +28,12 @@
   ],
   "files": [
     "index.js",
-    "lib",
     "types/index.d.ts"
   ],
   "types": "types/index.d.ts",
   "dependencies": {
-    "fault": "^1.0.1"
+    "mdast-util-frontmatter": "^0.2.0",
+    "micromark-extension-frontmatter": "^0.2.0"
   },
   "devDependencies": {
     "browserify": "^16.0.0",
@@ -42,7 +42,7 @@
     "not": "^0.1.0",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",
-    "remark": "^12.0.0",
+    "remark": "^13.0.0-alpha.1",
     "remark-cli": "^8.0.0",
     "remark-preset-wooorm": "^7.0.0",
     "tape": "^5.0.0",
diff --git a/readme.md b/readme.md
index c66c4e7..bf161c4 100644
--- a/readme.md
+++ b/readme.md
@@ -10,6 +10,14 @@
 
 [**remark**][remark] plugin to support frontmatter (YAML, TOML, and more).
 
+## Important!
+
+This plugin is affected by the new parser in remark
+([`micromark`](https://github.com/micromark/micromark),
+see [`remarkjs/remark#536`](https://github.com/remarkjs/remark/pull/536)).
+Use version 2 while you’re still on remark 12.
+Use version 3 for remark 13+.
+
 ## Install
 
 [npm][]:
@@ -45,9 +53,9 @@ unified()
   .use(stringify)
   .use(frontmatter, ['yaml', 'toml'])
   .use(logger)
-  .process(vfile.readSync('example.md'), function(err, file) {
-    console.log(String(file))
+  .process(vfile.readSync('example.md'), function (err, file) {
     console.error(report(err || file))
+    console.log(String(file))
   })
 
 function logger() {
@@ -58,16 +66,17 @@ function logger() {
 Now, running `node example` yields:
 
 ```js
-{ type: 'root',
-  children:
-   [ { type: 'toml',
-       value: 'title = "New Website"',
-       position: [Object] },
-     { type: 'heading',
-       depth: 1,
-       children: [Array],
-       position: [Object] } ],
-  position: [Object] }
+{
+  type: 'root',
+  children: [
+    {type: 'toml', value: 'title = "New Website"', position: [Object]},
+    {type: 'heading', depth: 1, children: [Array], position: [Object]}
+  ],
+  position: {
+    start: {line: 1, column: 1, offset: 0},
+    end: {line: 6, column: 1, offset: 48}
+  }
+}
 ```
 
 ```markdown
@@ -83,117 +92,12 @@ title = "New Website"
 
 ### `remark().use(frontmatter[, options])`
 
-Support frontmatter (YAML, TOML, and more).
-Adds [tokenizers][] if the [processor][] is configured with
-[`remark-parse`][parse], and [visitors][] if configured with
-[`remark-stringify`][stringify].
-
-If you are parsing from a different syntax, or compiling to a different syntax
-(such as, [`remark-man`][man]) your custom nodes may not be supported.
+Configures remark so that it can parse and serialize frontmatter (YAML, TOML,
+and more).
 
 ##### `options`
 
-One [`preset`][preset] or [`Matter`][matter], or an array of them, defining all
-the supported frontmatters (default: `'yaml'`).
-
-##### `preset`
-
-Either `'yaml'` or `'toml'`:
-
-*   `'yaml'` — [`matter`][matter] defined as `{type: 'yaml', marker: '-'}`
-*   `'toml'` — [`matter`][matter] defined as `{type: 'toml', marker: '+'}`
-
-##### `Matter`
-
-An object with a `type` and either a `marker` or a `fence`:
-
-*   `type` (`string`)
-    — Node type to parse to in [mdast][] and compile from
-*   `marker` (`string` or `{open: string, close: string}`)
-    — Character used to construct fences.
-    By providing an object with `open` and `close`.
-    different characters can be used for opening and closing fences.
-    For example the character `'-'` will result in `'---'` being used as the
-    fence
-*   `fence` (`string` or `{open: string, close: string}`)
-    — String used as the complete fence.
-    By providing an object with `open` and `close` different values can be used
-    for opening and closing fences.
-    This can be used too if fences contain different characters or lengths other
-    than 3
-*   `anywhere` (`boolean`, default: `false`)
-    – if `true`, matter can be found anywhere in the document.
-    If `false` (default), only matter at the start of the document is recognized
-
-###### Example
-
-For `{type: 'yaml', marker: '-'}`:
-
-```yaml
----
-key: value
----
-```
-
-Yields:
-
-```json
-{
-  "type": "yaml",
-  "value": "key: value"
-}
-```
-
-For `{type: 'custom', marker: {open: '<', close: '>'}}`:
-
-```text
-<<<
-data
->>>
-```
-
-Yields:
-
-```json
-{
-  "type": "custom",
-  "value": "data"
-}
-```
-
-For `{type: 'custom', fence: '+=+=+=+'}`:
-
-```text
-+=+=+=+
-data
-+=+=+=+
-```
-
-Yields:
-
-```json
-{
-  "type": "custom",
-  "value": "data"
-}
-```
-
-For `{type: 'json', fence: {open: '{', close: '}'}}`:
-
-```json
-{
-  "key": "value"
-}
-```
-
-Yields:
-
-```json
-{
-  "type": "json",
-  "value": "\"key\": \"value\""
-}
-```
+See [`micromark-extension-frontmatter`][options] for a description of `options`.
 
 ## Security
 
@@ -203,10 +107,14 @@ Use of `remark-frontmatter` does not involve [**rehype**][rehype]
 
 ## Related
 
+*   [`remark-gfm`](https://github.com/remarkjs/remark-gfm)
+    — GitHub Flavored Markdown
+*   [`remark-footnotes`](https://github.com/remarkjs/remark-footnotes)
+    — Footnotes
+*   [`remark-math`](https://github.com/remarkjs/remark-math)
+    — Math
 *   [`remark-github`](https://github.com/remarkjs/remark-github)
     — Auto-link references like in GitHub issues, PRs, and comments
-*   [`remark-math`](https://github.com/rokt33r/remark-math)
-    — Math support
 *   [`remark-yaml-config`](https://github.com/remarkjs/remark-yaml-config)
     — Configure remark from YAML configuration
 
@@ -268,26 +176,10 @@ abide by its terms.
 
 [remark]: https://github.com/remarkjs/remark
 
-[parse]: https://github.com/remarkjs/remark/tree/HEAD/packages/remark-parse
-
-[tokenizers]: https://github.com/remarkjs/remark/tree/HEAD/packages/remark-parse#parserblocktokenizers
-
-[stringify]: https://github.com/remarkjs/remark/tree/HEAD/packages/remark-stringify
-
-[visitors]: https://github.com/remarkjs/remark/tree/HEAD/packages/remark-stringify#compilervisitors
-
-[processor]: https://github.com/unifiedjs/unified#processor
-
-[mdast]: https://github.com/syntax-tree/mdast
-
-[man]: https://github.com/remarkjs/remark-man
-
-[preset]: #preset
-
-[matter]: #matter
-
 [xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
 
 [rehype]: https://github.com/rehypejs/rehype
 
 [hast]: https://github.com/syntax-tree/hast
+
+[options]: https://github.com/micromark/micromark-extension-frontmatter#options
diff --git a/test/fixtures/config-options-as-matter/tree.json b/test/fixtures/config-options-as-matter/tree.json
index f762643..7d3df04 100644
--- a/test/fixtures/config-options-as-matter/tree.json
+++ b/test/fixtures/config-options-as-matter/tree.json
@@ -14,8 +14,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/config-options-as-string/tree.json b/test/fixtures/config-options-as-string/tree.json
index 3ae296b..593c0dc 100644
--- a/test/fixtures/config-options-as-string/tree.json
+++ b/test/fixtures/config-options-as-string/tree.json
@@ -14,8 +14,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/core-yaml-delayed/output.md b/test/fixtures/core-yaml-delayed/output.md
index 715bee6..b79854a 100644
--- a/test/fixtures/core-yaml-delayed/output.md
+++ b/test/fixtures/core-yaml-delayed/output.md
@@ -1,5 +1,5 @@
----
-title: post
----
+***
+
+## title: post
 
 # Later (whitespace before yaml)
diff --git a/test/fixtures/core-yaml-delayed/tree.json b/test/fixtures/core-yaml-delayed/tree.json
index 7c67f87..9490f0d 100644
--- a/test/fixtures/core-yaml-delayed/tree.json
+++ b/test/fixtures/core-yaml-delayed/tree.json
@@ -2,20 +2,52 @@
   "type": "root",
   "children": [
     {
-      "type": "yaml",
-      "value": "title: post",
+      "type": "thematicBreak",
       "position": {
         "start": {
           "line": 3,
           "column": 1,
           "offset": 2
         },
+        "end": {
+          "line": 3,
+          "column": 4,
+          "offset": 5
+        }
+      }
+    },
+    {
+      "type": "heading",
+      "depth": 2,
+      "children": [
+        {
+          "type": "text",
+          "value": "title: post",
+          "position": {
+            "start": {
+              "line": 4,
+              "column": 1,
+              "offset": 6
+            },
+            "end": {
+              "line": 4,
+              "column": 12,
+              "offset": 17
+            }
+          }
+        }
+      ],
+      "position": {
+        "start": {
+          "line": 4,
+          "column": 1,
+          "offset": 6
+        },
         "end": {
           "line": 5,
           "column": 4,
           "offset": 21
-        },
-        "indent": [1, 1]
+        }
       }
     },
     {
@@ -35,8 +67,7 @@
               "line": 7,
               "column": 33,
               "offset": 55
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +81,7 @@
           "line": 7,
           "column": 33,
           "offset": 55
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/core-yaml-not-at-top/output.md b/test/fixtures/core-yaml-not-at-top/output.md
index 3769912..887fc8e 100644
--- a/test/fixtures/core-yaml-not-at-top/output.md
+++ b/test/fixtures/core-yaml-not-at-top/output.md
@@ -1,6 +1,6 @@
 # Two horizontal rules
 
-* * *
+***
 
 ## A horizontal rule
 
diff --git a/test/fixtures/core-yaml-not-at-top/tree.json b/test/fixtures/core-yaml-not-at-top/tree.json
index 266f016..1987b6f 100644
--- a/test/fixtures/core-yaml-not-at-top/tree.json
+++ b/test/fixtures/core-yaml-not-at-top/tree.json
@@ -18,8 +18,7 @@
               "line": 1,
               "column": 23,
               "offset": 22
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -33,8 +32,7 @@
           "line": 1,
           "column": 23,
           "offset": 22
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -49,8 +47,7 @@
           "line": 3,
           "column": 4,
           "offset": 27
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -70,8 +67,7 @@
               "line": 4,
               "column": 18,
               "offset": 45
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -85,8 +81,7 @@
           "line": 5,
           "column": 4,
           "offset": 49
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -105,8 +100,7 @@
               "line": 7,
               "column": 13,
               "offset": 63
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -120,8 +114,7 @@
           "line": 7,
           "column": 13,
           "offset": 63
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-deep/tree.json b/test/fixtures/custom-deep/tree.json
index dfc7895..5567fde 100644
--- a/test/fixtures/custom-deep/tree.json
+++ b/test/fixtures/custom-deep/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 4,
           "offset": 49
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 57
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 57
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-default/output.md b/test/fixtures/custom-default/output.md
index 2a341da..afee159 100644
--- a/test/fixtures/custom-default/output.md
+++ b/test/fixtures/custom-default/output.md
@@ -1,9 +1,9 @@
-* * *
+***
 
 {
-  "hello": "World!"
+"hello": "World!"
 }
 
-* * *
+***
 
 # Default
diff --git a/test/fixtures/custom-default/tree.json b/test/fixtures/custom-default/tree.json
index 33fd012..075478e 100644
--- a/test/fixtures/custom-default/tree.json
+++ b/test/fixtures/custom-default/tree.json
@@ -13,8 +13,7 @@
           "line": 1,
           "column": 4,
           "offset": 3
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -22,7 +21,7 @@
       "children": [
         {
           "type": "text",
-          "value": "{\n  \"hello\": \"World!\"\n}",
+          "value": "{\n\"hello\": \"World!\"\n}",
           "position": {
             "start": {
               "line": 2,
@@ -33,8 +32,7 @@
               "line": 4,
               "column": 2,
               "offset": 27
-            },
-            "indent": [1, 1]
+            }
           }
         }
       ],
@@ -48,8 +46,7 @@
           "line": 4,
           "column": 2,
           "offset": 27
-        },
-        "indent": [1, 1]
+        }
       }
     },
     {
@@ -64,8 +61,7 @@
           "line": 5,
           "column": 4,
           "offset": 31
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -85,8 +81,7 @@
               "line": 7,
               "column": 10,
               "offset": 42
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -100,8 +95,7 @@
           "line": 7,
           "column": 10,
           "offset": 42
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-empty/tree.json b/test/fixtures/custom-empty/tree.json
index f762643..7d3df04 100644
--- a/test/fixtures/custom-empty/tree.json
+++ b/test/fixtures/custom-empty/tree.json
@@ -14,8 +14,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-fence-long/tree.json b/test/fixtures/custom-fence-long/tree.json
index 723ecfb..2718f76 100644
--- a/test/fixtures/custom-fence-long/tree.json
+++ b/test/fixtures/custom-fence-long/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 11,
           "offset": 63
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 71
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 71
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-fence-openclose/tree.json b/test/fixtures/custom-fence-openclose/tree.json
index ced98ef..9a665d1 100644
--- a/test/fixtures/custom-fence-openclose/tree.json
+++ b/test/fixtures/custom-fence-openclose/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 8,
           "offset": 56
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 64
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 64
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-fence-short/tree.json b/test/fixtures/custom-fence-short/tree.json
index e83f786..9f9ce1d 100644
--- a/test/fixtures/custom-fence-short/tree.json
+++ b/test/fixtures/custom-fence-short/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 3,
           "offset": 47
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 55
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 55
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-fence/tree.json b/test/fixtures/custom-fence/tree.json
index dfc7895..5567fde 100644
--- a/test/fixtures/custom-fence/tree.json
+++ b/test/fixtures/custom-fence/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 4,
           "offset": 49
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 57
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 57
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-marker-openclose/tree.json b/test/fixtures/custom-marker-openclose/tree.json
index dfc7895..5567fde 100644
--- a/test/fixtures/custom-marker-openclose/tree.json
+++ b/test/fixtures/custom-marker-openclose/tree.json
@@ -14,8 +14,7 @@
           "line": 6,
           "column": 4,
           "offset": 49
-        },
-        "indent": [1, 1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 8,
               "column": 7,
               "offset": 57
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 8,
           "column": 7,
           "offset": 57
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/custom-yaml-anywhere/tree.json b/test/fixtures/custom-yaml-anywhere/tree.json
index 78be2fe..6051858 100644
--- a/test/fixtures/custom-yaml-anywhere/tree.json
+++ b/test/fixtures/custom-yaml-anywhere/tree.json
@@ -18,8 +18,7 @@
               "line": 1,
               "column": 22,
               "offset": 21
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -33,8 +32,7 @@
           "line": 1,
           "column": 22,
           "offset": 21
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -50,8 +48,7 @@
           "line": 5,
           "column": 4,
           "offset": 42
-        },
-        "indent": [1, 1]
+        }
       }
     },
     {
@@ -70,8 +67,7 @@
               "line": 7,
               "column": 10,
               "offset": 53
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -85,8 +81,7 @@
           "line": 7,
           "column": 10,
           "offset": 53
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/toml-advanced/tree.json b/test/fixtures/toml-advanced/tree.json
index 4a172cc..1091746 100644
--- a/test/fixtures/toml-advanced/tree.json
+++ b/test/fixtures/toml-advanced/tree.json
@@ -14,41 +14,7 @@
           "line": 33,
           "column": 4,
           "offset": 524
-        },
-        "indent": [
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1
-        ]
+        }
       }
     },
     {
@@ -68,8 +34,7 @@
               "line": 35,
               "column": 15,
               "offset": 540
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -83,8 +48,7 @@
           "line": 35,
           "column": 15,
           "offset": 540
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/toml-deep/tree.json b/test/fixtures/toml-deep/tree.json
index 50d0f78..26bf304 100644
--- a/test/fixtures/toml-deep/tree.json
+++ b/test/fixtures/toml-deep/tree.json
@@ -14,8 +14,7 @@
           "line": 4,
           "column": 4,
           "offset": 43
-        },
-        "indent": [1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 6,
               "column": 7,
               "offset": 51
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 6,
           "column": 7,
           "offset": 51
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/toml-default/tree.json b/test/fixtures/toml-default/tree.json
index 1beb531..59cb060 100644
--- a/test/fixtures/toml-default/tree.json
+++ b/test/fixtures/toml-default/tree.json
@@ -17,8 +17,7 @@
               "line": 3,
               "column": 4,
               "offset": 22
-            },
-            "indent": [1, 1]
+            }
           }
         }
       ],
@@ -32,8 +31,7 @@
           "line": 3,
           "column": 4,
           "offset": 22
-        },
-        "indent": [1, 1]
+        }
       }
     },
     {
@@ -53,8 +51,7 @@
               "line": 5,
               "column": 10,
               "offset": 33
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -68,8 +65,7 @@
           "line": 5,
           "column": 10,
           "offset": 33
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/toml-empty/tree.json b/test/fixtures/toml-empty/tree.json
index 4a4a021..a75b8cf 100644
--- a/test/fixtures/toml-empty/tree.json
+++ b/test/fixtures/toml-empty/tree.json
@@ -14,8 +14,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/toml-unconfigured/tree.json b/test/fixtures/toml-unconfigured/tree.json
index a70fc7b..dbf3d18 100644
--- a/test/fixtures/toml-unconfigured/tree.json
+++ b/test/fixtures/toml-unconfigured/tree.json
@@ -17,8 +17,7 @@
               "line": 2,
               "column": 4,
               "offset": 7
-            },
-            "indent": [1]
+            }
           }
         }
       ],
@@ -32,8 +31,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -53,8 +51,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -68,8 +65,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-advanced/tree.json b/test/fixtures/yaml-advanced/tree.json
index b616fd4..0634528 100644
--- a/test/fixtures/yaml-advanced/tree.json
+++ b/test/fixtures/yaml-advanced/tree.json
@@ -14,38 +14,7 @@
           "line": 30,
           "column": 4,
           "offset": 614
-        },
-        "indent": [
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1,
-          1
-        ]
+        }
       }
     },
     {
@@ -65,8 +34,7 @@
               "line": 32,
               "column": 15,
               "offset": 630
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -80,8 +48,7 @@
           "line": 32,
           "column": 15,
           "offset": 630
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-closed-incorrectly/output.md b/test/fixtures/yaml-closed-incorrectly/output.md
index 9b731de..a609e2b 100644
--- a/test/fixtures/yaml-closed-incorrectly/output.md
+++ b/test/fixtures/yaml-closed-incorrectly/output.md
@@ -1,3 +1,3 @@
-* * *
+***
 
 # Incorrect ---
diff --git a/test/fixtures/yaml-closed-incorrectly/tree.json b/test/fixtures/yaml-closed-incorrectly/tree.json
index 8d9366d..66d36b2 100644
--- a/test/fixtures/yaml-closed-incorrectly/tree.json
+++ b/test/fixtures/yaml-closed-incorrectly/tree.json
@@ -13,8 +13,7 @@
           "line": 1,
           "column": 4,
           "offset": 3
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -34,8 +33,7 @@
               "line": 3,
               "column": 16,
               "offset": 20
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -49,8 +47,7 @@
           "line": 3,
           "column": 16,
           "offset": 20
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-deep/tree.json b/test/fixtures/yaml-deep/tree.json
index 822e523..25f1681 100644
--- a/test/fixtures/yaml-deep/tree.json
+++ b/test/fixtures/yaml-deep/tree.json
@@ -14,8 +14,7 @@
           "line": 5,
           "column": 4,
           "offset": 44
-        },
-        "indent": [1, 1, 1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 7,
               "column": 7,
               "offset": 52
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 7,
           "column": 7,
           "offset": 52
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-default/tree.json b/test/fixtures/yaml-default/tree.json
index 58aa2ed..7cb7b95 100644
--- a/test/fixtures/yaml-default/tree.json
+++ b/test/fixtures/yaml-default/tree.json
@@ -14,8 +14,7 @@
           "line": 3,
           "column": 4,
           "offset": 22
-        },
-        "indent": [1, 1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 5,
               "column": 10,
               "offset": 33
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 5,
           "column": 10,
           "offset": 33
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-empty/tree.json b/test/fixtures/yaml-empty/tree.json
index 3ae296b..593c0dc 100644
--- a/test/fixtures/yaml-empty/tree.json
+++ b/test/fixtures/yaml-empty/tree.json
@@ -14,8 +14,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": [1]
+        }
       }
     },
     {
@@ -35,8 +34,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -50,8 +48,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-unclosed/output.md b/test/fixtures/yaml-unclosed/output.md
index 6ccf7af..5a8ae6c 100644
--- a/test/fixtures/yaml-unclosed/output.md
+++ b/test/fixtures/yaml-unclosed/output.md
@@ -1,3 +1,3 @@
-* * *
+***
 
 # Unclosed
diff --git a/test/fixtures/yaml-unclosed/tree.json b/test/fixtures/yaml-unclosed/tree.json
index df42148..5f7beb7 100644
--- a/test/fixtures/yaml-unclosed/tree.json
+++ b/test/fixtures/yaml-unclosed/tree.json
@@ -13,8 +13,7 @@
           "line": 1,
           "column": 4,
           "offset": 3
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -34,8 +33,7 @@
               "line": 3,
               "column": 11,
               "offset": 15
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -49,8 +47,7 @@
           "line": 3,
           "column": 11,
           "offset": 15
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/test/fixtures/yaml-unconfigured/output.md b/test/fixtures/yaml-unconfigured/output.md
index 514e45f..740ca4a 100644
--- a/test/fixtures/yaml-unconfigured/output.md
+++ b/test/fixtures/yaml-unconfigured/output.md
@@ -1,5 +1,5 @@
-* * *
+***
 
-* * *
+***
 
 # Empty
diff --git a/test/fixtures/yaml-unconfigured/tree.json b/test/fixtures/yaml-unconfigured/tree.json
index 47de3d7..dee7e5c 100644
--- a/test/fixtures/yaml-unconfigured/tree.json
+++ b/test/fixtures/yaml-unconfigured/tree.json
@@ -13,8 +13,7 @@
           "line": 1,
           "column": 4,
           "offset": 3
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -29,8 +28,7 @@
           "line": 2,
           "column": 4,
           "offset": 7
-        },
-        "indent": []
+        }
       }
     },
     {
@@ -50,8 +48,7 @@
               "line": 4,
               "column": 8,
               "offset": 16
-            },
-            "indent": []
+            }
           }
         }
       ],
@@ -65,8 +62,7 @@
           "line": 4,
           "column": 8,
           "offset": 16
-        },
-        "indent": []
+        }
       }
     }
   ],
diff --git a/types/index.d.ts b/types/index.d.ts
index dbd479d..a256daf 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -37,7 +37,7 @@ declare namespace remarkFrontmatter {
     fence?: string | Fence
 
     /**
-     * if `true`, matter can be found anywhere in the document.
+     * If `true`, matter can be found anywhere in the document.
      * If `false` (default), only matter at the start of the document is recognized
      *
      * @default false