diff --git a/.github/workflows/bb.yml b/.github/workflows/bb.yml
new file mode 100644
index 0000000..0198fc3
--- /dev/null
+++ b/.github/workflows/bb.yml
@@ -0,0 +1,13 @@
+name: bb
+on:
+  issues:
+    types: [opened, reopened, edited, closed, labeled, unlabeled]
+  pull_request_target:
+    types: [opened, reopened, edited, closed, labeled, unlabeled]
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: unifiedjs/beep-boop-beta@main
+        with:
+          repo-token: ${{secrets.GITHUB_TOKEN}}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..fe284ad
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,21 @@
+name: main
+on:
+  - pull_request
+  - push
+jobs:
+  main:
+    name: ${{matrix.node}}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: dcodeIO/setup-node-nvm@master
+        with:
+          node-version: ${{matrix.node}}
+      - run: npm install
+      - run: npm test
+      - uses: codecov/codecov-action@v1
+    strategy:
+      matrix:
+        node:
+          - lts/erbium
+          - node
diff --git a/.gitignore b/.gitignore
index fdefc8c..53a29e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
-.DS_Store
-*.log
-.nyc_output/
 coverage/
 node_modules/
+.DS_Store
+*.d.ts
+*.log
 yarn.lock
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index e108609..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-language: node_js
-node_js:
-  - lts/dubnium
-  - node
-after_script: bash <(curl -s https://codecov.io/bash)
diff --git a/index.js b/index.js
index 1f9d36b..7c44ca4 100644
--- a/index.js
+++ b/index.js
@@ -1,39 +1,34 @@
-'use strict'
+/**
+ * @typedef {import('mdast').Root} Root
+ * @typedef {import('micromark-extension-gfm').Options & import('mdast-util-gfm').Options} Options
+ */
 
-var syntax = require('micromark-extension-gfm')
-var fromMarkdown = require('mdast-util-gfm/from-markdown')
-var toMarkdown = require('mdast-util-gfm/to-markdown')
+import {gfm} from 'micromark-extension-gfm'
+import {gfmFromMarkdown, gfmToMarkdown} from 'mdast-util-gfm'
 
-var warningIssued
+/**
+ * Plugin to support GitHub Flavored Markdown (GFM).
+ *
+ * @type {import('unified').Plugin<[Options?]|void[], Root>}
+ */
+export default function remarkGfm(options = {}) {
+  const data = this.data()
 
-module.exports = gfm
+  add('micromarkExtensions', gfm(options))
+  add('fromMarkdownExtensions', gfmFromMarkdown)
+  add('toMarkdownExtensions', gfmToMarkdown(options))
 
-function gfm(options) {
-  var data = this.data()
-
-  /* istanbul ignore next - old remark. */
-  if (
-    !warningIssued &&
-    ((this.Parser &&
-      this.Parser.prototype &&
-      this.Parser.prototype.blockTokenizers) ||
-      (this.Compiler &&
-        this.Compiler.prototype &&
-        this.Compiler.prototype.visitors))
-  ) {
-    warningIssued = true
-    console.warn(
-      '[remark-gfm] Warning: please upgrade to remark 13 to use this plugin'
+  /**
+   * @param {string} field
+   * @param {unknown} value
+   */
+  function add(field, value) {
+    const list = /** @type {unknown[]} */ (
+      // Other extensions
+      /* c8 ignore next 2 */
+      data[field] ? data[field] : (data[field] = [])
     )
-  }
 
-  add('micromarkExtensions', syntax(options))
-  add('fromMarkdownExtensions', fromMarkdown)
-  add('toMarkdownExtensions', toMarkdown(options))
-
-  function add(field, value) {
-    /* istanbul ignore if - other extensions. */
-    if (data[field]) data[field].push(value)
-    else data[field] = [value]
+    list.push(value)
   }
 }
diff --git a/package.json b/package.json
index ed9245f..3e442a6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "remark-gfm",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "remark plugin to support GFM (autolink literals, strikethrough, tables, tasklists)",
   "license": "MIT",
   "keywords": [
@@ -27,42 +27,43 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
-  "types": "types/index.d.ts",
+  "sideEffects": false,
+  "type": "module",
+  "main": "index.js",
+  "types": "index.d.ts",
   "files": [
-    "types/index.d.ts",
+    "index.d.ts",
     "index.js"
   ],
   "dependencies": {
-    "mdast-util-gfm": "^0.1.0",
-    "micromark-extension-gfm": "^0.3.0"
+    "@types/mdast": "^3.0.0",
+    "mdast-util-gfm": "^1.0.0",
+    "micromark-extension-gfm": "^1.0.0",
+    "unified": "^10.0.0"
   },
   "devDependencies": {
+    "@types/tape": "^4.0.0",
+    "c8": "^7.0.0",
     "dtslint": "^4.0.0",
-    "is-hidden": "^1.0.0",
-    "not": "^0.1.0",
-    "nyc": "^15.0.0",
+    "is-hidden": "^2.0.0",
     "prettier": "^2.0.0",
-    "remark": "^13.0.0-alpha.1",
-    "remark-cli": "^8.0.0",
-    "remark-preset-wooorm": "^7.0.0",
-    "string-width": "^4.2.0",
+    "remark": "^14.0.0",
+    "remark-cli": "^10.0.0",
+    "remark-preset-wooorm": "^8.0.0",
+    "rimraf": "^3.0.0",
+    "string-width": "^5.0.0",
     "tape": "^5.0.0",
-    "to-vfile": "^6.0.0",
-    "unified": "^9.0.0",
-    "xo": "^0.33.0"
+    "to-vfile": "^7.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^4.0.0",
+    "xo": "^0.43.0"
   },
   "scripts": {
-    "format": "remark . -qfo --ignore-pattern test/ && prettier . --write && xo --fix",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test/index.js",
-    "test-types": "dtslint types",
-    "test": "npm run format && npm run test-coverage && npm run test-types"
-  },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
+    "build": "rimraf \"test/**/*.d.ts\" \"*.d.ts\" && tsc && type-coverage",
+    "format": "remark . -qfo --ignore-pattern test/ && prettier . -w --loglevel warn && xo --fix",
+    "test-api": "node --conditions development test/index.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov npm run test-api",
+    "test": "npm run build && npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,
@@ -73,16 +74,17 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true,
-    "esnext": false,
-    "rules": {
-      "unicorn/no-fn-reference-in-iterator": "off",
-      "unicorn/prefer-optional-catch-binding": "off"
-    }
+    "prettier": true
   },
   "remarkConfig": {
     "plugins": [
       "preset-wooorm"
     ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "strict": true,
+    "ignoreCatch": true
   }
 }
diff --git a/readme.md b/readme.md
index e40c39c..723b210 100644
--- a/readme.md
+++ b/readme.md
@@ -20,6 +20,9 @@ Use this plugin for remark 13+.
 
 ## Install
 
+This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
+Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
+
 [npm][]:
 
 ```sh
@@ -52,24 +55,25 @@ www.example.com, https://example.com, and contact@example.com.
 * [x] done
 ```
 
-And our script, `example.js`, looks as follows:
+And our module, `example.js`, looks as follows:
 
 ```js
-var vfile = require('to-vfile')
-var report = require('vfile-reporter')
-var unified = require('unified')
-var parse = require('remark-parse')
-var gfm = require('remark-gfm')
-var remark2rehype = require('remark-rehype')
-var stringify = require('rehype-stringify')
+import {readSync} from 'to-vfile'
+import {reporter} from 'vfile-reporter'
+import {unified} from 'unified'
+import remarkParse from 'remark-parse'
+import remarkGfm from 'remark-gfm'
+import remarkRehype from 'remark-rehype'
+import remarkStringify from 'rehype-stringify'
 
 unified()
-  .use(parse)
-  .use(gfm)
-  .use(remark2rehype)
-  .use(stringify)
-  .process(vfile.readSync('example.md'), function (err, file) {
-    console.error(report(err || file))
+  .use(remarkParse)
+  .use(remarkGfm)
+  .use(remarkRehype)
+  .use(remarkStringify)
+  .process(readSync('example.md'))
+  .then((file) => {
+    console.error(reporter(file))
     console.log(String(file))
   })
 ```
@@ -103,7 +107,10 @@ example.md: no issues found
 
 ## API
 
-### `remark().use(gfm[, options])`
+This package exports no identifiers.
+The default export is `remarkGfm`.
+
+### `unified().use(remarkGfm[, options])`
 
 Configures remark so that it can parse and serialize GFM (autolink literals,
 strikethrough, tables, tasklists).
@@ -152,7 +159,7 @@ attacks.
     — Footnotes
 *   [`remark-frontmatter`](https://github.com/remarkjs/remark-frontmatter)
     — Frontmatter (YAML, TOML, and more)
-*   [`remark-math`](https://github.com/rokt33r/remark-math)
+*   [`remark-math`](https://github.com/remarkjs/remark-math)
     — Math
 
 ## Contribute
@@ -171,9 +178,9 @@ abide by its terms.
 
 <!-- Definitions -->
 
-[build-badge]: https://img.shields.io/travis/remarkjs/remark-gfm/main.svg
+[build-badge]: https://github.com/remarkjs/remark-gfm/workflows/main/badge.svg
 
-[build]: https://travis-ci.org/remarkjs/remark-gfm
+[build]: https://github.com/remarkjs/remark-gfm/actions
 
 [coverage-badge]: https://img.shields.io/codecov/c/github/remarkjs/remark-gfm.svg
 
diff --git a/test/fixtures/autolink-literal/input.md b/test/fixtures/autolink-literal/input.md
index 1fd2f30..76efeb7 100644
--- a/test/fixtures/autolink-literal/input.md
+++ b/test/fixtures/autolink-literal/input.md
@@ -83,3 +83,5 @@ a@a-b.c
 Can’t end in an underscore followed by a period: aaa@a.b_.
 
 Can contain an underscore followed by a period: aaa@a.b_.c
+
+[https://google.com](https://google.com)
diff --git a/test/fixtures/autolink-literal/output.md b/test/fixtures/autolink-literal/output.md
index e95f2f1..d9c1644 100644
--- a/test/fixtures/autolink-literal/output.md
+++ b/test/fixtures/autolink-literal/output.md
@@ -52,7 +52,7 @@ Visit [www.commonmark.org/a.b](http://www.commonmark.org/a.b).
 
 <https://example.com>
 
-https\://example
+<https://example>
 
 <http://commonmark.org>
 
@@ -83,3 +83,5 @@ a.b-c_d\@a.b\_
 Can’t end in an underscore followed by a period: aaa\@a.b\_.
 
 Can contain an underscore followed by a period: <aaa@a.b_.c>
+
+<https://google.com>
diff --git a/test/fixtures/autolink-literal/tree.json b/test/fixtures/autolink-literal/tree.json
index 458412a..2165724 100644
--- a/test/fixtures/autolink-literal/tree.json
+++ b/test/fixtures/autolink-literal/tree.json
@@ -430,19 +430,7 @@
       "children": [
         {
           "type": "text",
-          "value": "www.aaa.bbb.ccc_ccc",
-          "position": {
-            "start": {
-              "line": 15,
-              "column": 1,
-              "offset": 190
-            },
-            "end": {
-              "line": 15,
-              "column": 20,
-              "offset": 209
-            }
-          }
+          "value": "www.aaa.bbb.ccc_ccc"
         }
       ],
       "position": {
@@ -463,19 +451,7 @@
       "children": [
         {
           "type": "text",
-          "value": "www.aaa_bbb.ccc",
-          "position": {
-            "start": {
-              "line": 17,
-              "column": 1,
-              "offset": 211
-            },
-            "end": {
-              "line": 17,
-              "column": 16,
-              "offset": 226
-            }
-          }
+          "value": "www.aaa_bbb.ccc"
         }
       ],
       "position": {
@@ -496,19 +472,7 @@
       "children": [
         {
           "type": "text",
-          "value": "www.aaa.bbb.ccc.ddd_ddd",
-          "position": {
-            "start": {
-              "line": 19,
-              "column": 1,
-              "offset": 228
-            },
-            "end": {
-              "line": 19,
-              "column": 24,
-              "offset": 251
-            }
-          }
+          "value": "www.aaa.bbb.ccc.ddd_ddd"
         }
       ],
       "position": {
@@ -529,19 +493,7 @@
       "children": [
         {
           "type": "text",
-          "value": "www.aaa.bbb.ccc_ccc.ddd",
-          "position": {
-            "start": {
-              "line": 21,
-              "column": 1,
-              "offset": 253
-            },
-            "end": {
-              "line": 21,
-              "column": 24,
-              "offset": 276
-            }
-          }
+          "value": "www.aaa.bbb.ccc_ccc.ddd"
         }
       ],
       "position": {
@@ -1535,8 +1487,27 @@
       "type": "paragraph",
       "children": [
         {
-          "type": "text",
-          "value": "https://example",
+          "type": "link",
+          "title": null,
+          "url": "https://example",
+          "children": [
+            {
+              "type": "text",
+              "value": "https://example",
+              "position": {
+                "start": {
+                  "line": 55,
+                  "column": 1,
+                  "offset": 813
+                },
+                "end": {
+                  "line": 55,
+                  "column": 16,
+                  "offset": 828
+                }
+              }
+            }
+          ],
           "position": {
             "start": {
               "line": 55,
@@ -2061,19 +2032,7 @@
       "children": [
         {
           "type": "text",
-          "value": "a.b-c_d@a.b-",
-          "position": {
-            "start": {
-              "line": 75,
-              "column": 1,
-              "offset": 1087
-            },
-            "end": {
-              "line": 75,
-              "column": 13,
-              "offset": 1099
-            }
-          }
+          "value": "a.b-c_d@a.b-"
         }
       ],
       "position": {
@@ -2094,19 +2053,7 @@
       "children": [
         {
           "type": "text",
-          "value": "a.b-c_d@a.b_",
-          "position": {
-            "start": {
-              "line": 77,
-              "column": 1,
-              "offset": 1101
-            },
-            "end": {
-              "line": 77,
-              "column": 13,
-              "offset": 1113
-            }
-          }
+          "value": "a.b-c_d@a.b_"
         }
       ],
       "position": {
@@ -2231,19 +2178,7 @@
       "children": [
         {
           "type": "text",
-          "value": "Can’t end in an underscore followed by a period: aaa@a.b_.",
-          "position": {
-            "start": {
-              "line": 83,
-              "column": 1,
-              "offset": 1133
-            },
-            "end": {
-              "line": 83,
-              "column": 59,
-              "offset": 1191
-            }
-          }
+          "value": "Can’t end in an underscore followed by a period: aaa@a.b_."
         }
       ],
       "position": {
@@ -2326,6 +2261,58 @@
           "offset": 1251
         }
       }
+    },
+    {
+      "type": "paragraph",
+      "children": [
+        {
+          "type": "link",
+          "title": null,
+          "url": "https://google.com",
+          "children": [
+            {
+              "type": "text",
+              "value": "https://google.com",
+              "position": {
+                "start": {
+                  "line": 87,
+                  "column": 2,
+                  "offset": 1254
+                },
+                "end": {
+                  "line": 87,
+                  "column": 20,
+                  "offset": 1272
+                }
+              }
+            }
+          ],
+          "position": {
+            "start": {
+              "line": 87,
+              "column": 1,
+              "offset": 1253
+            },
+            "end": {
+              "line": 87,
+              "column": 41,
+              "offset": 1293
+            }
+          }
+        }
+      ],
+      "position": {
+        "start": {
+          "line": 87,
+          "column": 1,
+          "offset": 1253
+        },
+        "end": {
+          "line": 87,
+          "column": 41,
+          "offset": 1293
+        }
+      }
     }
   ],
   "position": {
@@ -2335,9 +2322,9 @@
       "offset": 0
     },
     "end": {
-      "line": 86,
+      "line": 88,
       "column": 1,
-      "offset": 1252
+      "offset": 1294
     }
   }
 }
diff --git a/test/fixtures/tasklist/tree.json b/test/fixtures/tasklist/tree.json
index 89589c9..d038554 100644
--- a/test/fixtures/tasklist/tree.json
+++ b/test/fixtures/tasklist/tree.json
@@ -21,8 +21,8 @@
                   "position": {
                     "start": {
                       "line": 1,
-                      "column": 6,
-                      "offset": 5
+                      "column": 7,
+                      "offset": 6
                     },
                     "end": {
                       "line": 1,
@@ -35,8 +35,8 @@
               "position": {
                 "start": {
                   "line": 1,
-                  "column": 3,
-                  "offset": 2
+                  "column": 7,
+                  "offset": 6
                 },
                 "end": {
                   "line": 1,
@@ -73,8 +73,8 @@
                   "position": {
                     "start": {
                       "line": 2,
-                      "column": 6,
-                      "offset": 16
+                      "column": 7,
+                      "offset": 17
                     },
                     "end": {
                       "line": 2,
@@ -87,8 +87,8 @@
               "position": {
                 "start": {
                   "line": 2,
-                  "column": 3,
-                  "offset": 13
+                  "column": 7,
+                  "offset": 17
                 },
                 "end": {
                   "line": 2,
diff --git a/test/index.js b/test/index.js
index e39d27d..a4ae0e7 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,78 +1,86 @@
-'use strict'
+/**
+ * @typedef {import('mdast').Root} Root
+ * @typedef {import('../index.js').Options} Options
+ */
 
-var fs = require('fs')
-var path = require('path')
-var test = require('tape')
-var vfile = require('to-vfile')
-var unified = require('unified')
-var remark = require('remark')
-var not = require('not')
-var hidden = require('is-hidden')
-var stringWidth = require('string-width')
-var gfm = require('..')
+import fs from 'node:fs'
+import path from 'node:path'
+import test from 'tape'
+import {readSync} from 'to-vfile'
+import {unified} from 'unified'
+import {remark} from 'remark'
+import {isHidden} from 'is-hidden'
+import stringWidth from 'string-width'
+import gfm from '../index.js'
 
-test('gfm()', function (t) {
-  t.doesNotThrow(function () {
+test('gfm()', (t) => {
+  t.doesNotThrow(() => {
     remark().use(gfm).freeze()
   }, 'should not throw if not passed options')
 
-  t.doesNotThrow(function () {
+  t.doesNotThrow(() => {
     unified().use(gfm).freeze()
   }, 'should not throw if without parser or compiler')
 
   t.end()
 })
 
-test('fixtures', function (t) {
-  var base = path.join(__dirname, 'fixtures')
-  var entries = fs.readdirSync(base).filter(not(hidden))
+test('fixtures', (t) => {
+  const base = path.join('test', 'fixtures')
+  const entries = fs.readdirSync(base)
+  let index = -1
 
-  t.plan(entries.length)
+  while (++index < entries.length) {
+    if (isHidden(entries[index])) continue
 
-  entries.forEach(each)
+    const file = readSync(path.join(base, entries[index], 'input.md'))
+    const input = String(file.value)
+    const treePath = path.join(base, entries[index], 'tree.json')
+    /** @type {Options|undefined} */
+    let config
 
-  function each(fixture) {
-    t.test(fixture, function (st) {
-      var file = vfile.readSync(path.join(base, fixture, 'input.md'))
-      var input = String(file.contents)
-      var outputPath = path.join(base, fixture, 'output.md')
-      var treePath = path.join(base, fixture, 'tree.json')
-      var configPath = path.join(base, fixture, 'config.json')
-      var config
-      var proc
-      var actual
-      var output
-      var expected
+    try {
+      config = JSON.parse(
+        String(fs.readFileSync(path.join(base, entries[index], 'config.json')))
+      )
+    } catch {}
 
-      try {
-        config = JSON.parse(fs.readFileSync(configPath))
-      } catch (_) {}
+    if (entries[index] === 'table-string-length') {
+      config = {stringLength: stringWidth}
+    }
 
-      if (fixture === 'table-string-length') {
-        config = {stringLength: stringWidth}
-      }
+    const proc = remark().use(gfm, config).freeze()
+    const actual = proc.parse(file)
+    /** @type {Root} */
+    let expected
 
-      proc = remark().use(gfm, config).freeze()
-      actual = proc.parse(file)
+    try {
+      expected = JSON.parse(String(fs.readFileSync(treePath)))
+    } catch {
+      // New fixture.
+      fs.writeFileSync(treePath, JSON.stringify(actual, null, 2) + '\n')
+      expected = actual
+    }
 
-      try {
-        expected = JSON.parse(fs.readFileSync(treePath))
-      } catch (_) {
-        // New fixture.
-        fs.writeFileSync(treePath, JSON.stringify(actual, 0, 2) + '\n')
-        expected = actual
-      }
+    /** @type {string} */
+    let output
 
-      try {
-        output = fs.readFileSync(outputPath, 'utf8')
-      } catch (_) {
-        output = input
-      }
+    try {
+      output = fs.readFileSync(
+        path.join(base, entries[index], 'output.md'),
+        'utf8'
+      )
+    } catch {
+      output = input
+    }
 
-      st.deepEqual(actual, expected, 'tree')
-      st.equal(String(proc.processSync(file)), output, 'process')
-
-      st.end()
-    })
+    t.deepEqual(actual, expected, entries[index] + ' (tree)')
+    t.equal(
+      String(proc.processSync(file)),
+      output,
+      entries[index] + ' (process)'
+    )
   }
+
+  t.end()
 })
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..a93b9f9
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,16 @@
+{
+  "include": ["test/**/*.js", "*.js"],
+  "compilerOptions": {
+    "target": "ES2020",
+    "lib": ["ES2020"],
+    "module": "ES2020",
+    "moduleResolution": "node",
+    "allowJs": true,
+    "checkJs": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "allowSyntheticDefaultImports": true,
+    "skipLibCheck": true,
+    "strict": true
+  }
+}
diff --git a/types/index.d.ts b/types/index.d.ts
deleted file mode 100644
index a37d302..0000000
--- a/types/index.d.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-// TypeScript Version: 3.4
-
-import {Plugin} from 'unified'
-
-declare namespace remarkGfm {
-  type Gfm = Plugin<[RemarkGfmOptions?]>
-
-  interface RemarkGfmOptions {
-    /**
-     * Whether to support `~single tilde~` strikethrough.
-     *
-     * @defaultValue true
-     */
-    singleTilde?: boolean
-    /**
-     * Create tables with a space between cell delimiters (`|`) and content.
-     *
-     * @defaultValue true
-     */
-    tableCellPadding?: boolean
-    /**
-     * Align the delimiters (`|`) between table cells so that they all align
-     * nicely and form a grid.
-     *
-     * @defaultValue true
-     */
-    tablePipeAlign?: boolean
-    /**
-     * Function to detect the length of a table cell. Used to align tables.
-     *
-     * @defaultValue s => s.length
-     */
-    stringLength?: (s: string) => number
-  }
-}
-
-declare const remarkGfm: remarkGfm.Gfm
-
-export = remarkGfm
diff --git a/types/test.ts b/types/test.ts
deleted file mode 100644
index b0c545b..0000000
--- a/types/test.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import unified = require('unified')
-import gfm = require('remark-gfm')
-
-unified().use(gfm)
-unified().use(gfm, {})
-
-unified().use(gfm, {singleTilde: true})
-unified().use(gfm, {singleTilde: false})
-unified().use(gfm, {singleTilde: 1}) // $ExpectError
-
-unified().use(gfm, {tableCellPadding: true})
-unified().use(gfm, {tableCellPadding: false})
-unified().use(gfm, {tableCellPadding: []}) // $ExpectError
-
-unified().use(gfm, {tablePipeAlign: true})
-unified().use(gfm, {tablePipeAlign: false})
-unified().use(gfm, {tablePipeAlign: ''}) // $ExpectError
-
-unified().use(gfm, {stringLength: (_: string) => 0})
-unified().use(gfm, {stringLength: (_: string) => false}) // $ExpectError
-
-unified().use(gfm, {weird: true}) // $ExpectError
diff --git a/types/tsconfig.json b/types/tsconfig.json
deleted file mode 100644
index e883f1c..0000000
--- a/types/tsconfig.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "compilerOptions": {
-    "lib": ["es2015"],
-    "strict": true,
-    "baseUrl": ".",
-    "paths": {
-      "remark-gfm": ["index.d.ts"]
-    }
-  }
-}
diff --git a/types/tslint.json b/types/tslint.json
deleted file mode 100644
index 70c4494..0000000
--- a/types/tslint.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-  "extends": "dtslint/dtslint.json",
-  "rules": {
-    "semicolon": false,
-    "whitespace": false
-  }
-}