diff --git a/package.json b/package.json
index a78869f..c63c352 100644
--- a/package.json
+++ b/package.json
@@ -21,23 +21,29 @@
   },
   "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
   "contributors": [
-    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+    "Christian Murphy <christian.murphy.42@gmail.com>"
   ],
   "files": [
-    "index.js"
+    "index.js",
+    "types/index.d.ts"
   ],
+  "types": "types/index.d.ts",
   "dependencies": {
+    "@types/hast": "^2.0.0",
     "hast-util-from-parse5": "^5.0.0",
     "hast-util-to-parse5": "^5.0.0",
     "html-void-elements": "^1.0.0",
     "parse5": "^5.0.0",
     "unist-util-position": "^3.0.0",
+    "vfile": "^4.0.0",
     "web-namespaces": "^1.0.0",
     "xtend": "^4.0.0",
     "zwitch": "^1.0.0"
   },
   "devDependencies": {
     "browserify": "^16.0.0",
+    "dtslint": "^3.0.0",
     "hastscript": "^5.0.0",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",
@@ -59,7 +65,8 @@
     "build": "npm run build-bundle && npm run build-mangle",
     "test-api": "node test",
     "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run format && npm run build && npm run test-coverage"
+    "test-types": "dtslint types",
+    "test": "npm run format && npm run build && npm run test-coverage && npm run test-types"
   },
   "nyc": {
     "check-coverage": true,
diff --git a/types/hast-util-raw-test.ts b/types/hast-util-raw-test.ts
new file mode 100644
index 0000000..dbc1b6b
--- /dev/null
+++ b/types/hast-util-raw-test.ts
@@ -0,0 +1,12 @@
+import raw = require('hast-util-raw')
+import vFile = require('vfile')
+
+raw({type: 'raw', value: 'example'}) // $ExpectType Node
+raw({type: 'element', tagName: 'div', properties: {}, children: []}) // $ExpectType Node
+// prettier-ignore
+raw({type: 'element', tagName: 'div', properties: {}, children: []}, vFile('test')) // $ExpectType Node
+
+raw() // $ExpectError
+raw({}) // $ExpectError
+// prettier-ignore
+raw({type: 'element', tagName: 'div', properties: {}, children: []}, 'not a vFile') // $ExpectError
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..41c4e57
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,13 @@
+// Minimum TypeScript Version: 3.2
+
+import {Node} from 'hast'
+import {VFile} from 'vfile'
+
+/**
+ * Given a hast tree and an optional vfile (for positional info), return a new parsed-again hast tree.
+ * @param tree original hast tree
+ * @param file positional info
+ */
+declare function raw(tree: Node, file?: VFile): Node
+
+export = raw
diff --git a/types/tsconfig.json b/types/tsconfig.json
new file mode 100644
index 0000000..5c7afd5
--- /dev/null
+++ b/types/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "lib": ["es2015"],
+    "strict": true,
+    "baseUrl": ".",
+    "paths": {
+      "hast-util-raw": ["index.d.ts"]
+    }
+  }
+}
diff --git a/types/tslint.json b/types/tslint.json
new file mode 100644
index 0000000..759caa0
--- /dev/null
+++ b/types/tslint.json
@@ -0,0 +1,8 @@
+{
+  "extends": "dtslint/dtslint.json",
+  "rules": {
+    "no-redundant-jsdoc": false,
+    "semicolon": false,
+    "whitespace": false
+  }
+}