diff --git a/.gitignore b/.gitignore
index 0c93016..ba85f45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ node_modules/
 *.log
 .DS_Store
 yarn.lock
+!/index.d.ts
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..aa5af5c
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,32 @@
+/* eslint-disable @typescript-eslint/ban-types, @typescript-eslint/consistent-type-definitions */
+
+export {default} from './lib/index.js'
+
+/**
+ * Configuration.
+ */
+export interface Options {
+  /**
+   * Check relative values relative to this URL
+   * (optional, example: `'https://example.com/from'`).
+   */
+  from?: string | null | undefined
+  /**
+   * Whether to ignore `localhost` links such as `http://localhost/*`,
+   * `http://127.0.0.1/*`
+   * (default: `false`).
+   */
+  skipLocalhost?: boolean | null | undefined
+  /**
+   * Whether to let offline runs pass quietly
+   * (default: `false`).
+   */
+  skipOffline?: boolean | null | undefined
+  /**
+   * List of patterns for URLs that should be skipped
+   * (optional);
+   * each URL will be tested against each pattern and will be ignored if
+   * `new RegExp(pattern).test(url) === true`.
+   */
+  skipUrlPatterns?: ReadonlyArray<RegExp | string> | null | undefined
+}
diff --git a/lib/index.js b/lib/index.js
index be7dc35..c738875 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -2,25 +2,13 @@
  * @typedef {import('mdast').Nodes} Nodes
  * @typedef {import('mdast').Resource} Resource
  * @typedef {import('mdast').Root} Root
+ *
+ * @typedef {import('remark-lint-no-dead-urls').Options} Options
+ *
  * @typedef {import('vfile').VFile} VFile
  */
 
 /**
- * @typedef Options
- *   Configuration.
- * @property {string | null | undefined} [from]
- *   Check relative values relative to this URL (optiona, example:
- *   `'https://example.com/from'`).
- * @property {boolean | null | undefined} [skipLocalhost=false]
- *   Whether to ignore `localhost` links such as `http://localhost/*`,
- *   `http://127.0.0.1/*` (default: `false`).
- * @property {boolean | null | undefined} [skipOffline=false]
- *   Whether to let offline runs pass quietly (default: `false`).
- * @property {Array<RegExp | string> | null | undefined} [skipUrlPatterns]
- *   List of patterns for URLs that should be skipped (optional);
- *   each URL will be tested against each pattern and will be ignored if
- *   `new RegExp(pattern).test(url) === true`.
- *
  * @typedef {Extract<Nodes, Resource>} Resources
  *   Resource nodes.
  */
diff --git a/tsconfig.json b/tsconfig.json
index a3163d7..a31d13e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,5 +12,5 @@
     "target": "es2020"
   },
   "exclude": ["coverage/", "node_modules/"],
-  "include": ["**/*.js"]
+  "include": ["**/*.js", "index.d.ts"]
 }