diff --git a/hastscript-tests.ts b/hastscript-tests.ts
new file mode 100644
index 0000000..863a218
--- /dev/null
+++ b/hastscript-tests.ts
@@ -0,0 +1,18 @@
+import h = require('hastscript')
+import s = require('hastscript/svg')
+
+h() // $ExpectType Element
+h('.bar', {class: 'bar'}) // $ExpectType Element
+h('.bar', 'child text') // $ExpectType Element
+h('.bar', ['child text']) // $ExpectType Element
+h('.foo', {class: 'bar'}, h('.baz')) // $ExpectType Element
+h('.foo', {class: 'bar'}, [h('.baz')]) // $ExpectType Element
+h('.bar', {class: 'bar'}, 'child text') // $ExpectType Element
+h('.bar', {class: 'bar'}, ['child text']) // $ExpectType Element
+h(false) // $ExpectError
+
+// $ExpectType
+s('svg', {xmlns: 'http://www.w3.org/2000/svg', viewbox: '0 0 500 500'}, [
+  s('title', 'SVG `<circle` element'),
+  s('circle', {cx: 120, cy: 120, r: 100})
+])
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..372623d
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,29 @@
+// TypeScript Version: 3.5
+
+import {Element, Properties, Node} from 'hast'
+
+/**
+ * DSL to create virtual hast trees for HTML or SVG
+ *
+ * @param selector Simple CSS selector
+ * @param children (Lists of) child nodes
+ */
+declare function hastscript(
+  selector?: string,
+  children?: string | Node | Array<string | Node>
+): Element
+
+/**
+ * DSL to create virtual hast trees for HTML or SVG
+ *
+ * @param selector Simple CSS selector
+ * @param properties Map of properties
+ * @param children (Lists of) child nodes
+ */
+declare function hastscript(
+  selector?: string,
+  properties?: Properties,
+  children?: string | Node | Array<string | Node>
+): Element
+
+export = hastscript
diff --git a/package.json b/package.json
index f2528b9..af00b89 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,10 @@
   "contributors": [
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
+  "types": "index.d.ts",
   "files": [
+    "index.d.ts",
+    "svg.d.ts",
     "index.js",
     "factory.js",
     "html.js",
@@ -35,6 +38,7 @@
     "svg-case-sensitive-tag-names.json"
   ],
   "dependencies": {
+    "@types/hast": "^2.3.1",
     "comma-separated-tokens": "^1.0.0",
     "hast-util-parse-selector": "^2.0.0",
     "property-information": "^5.0.0",
@@ -42,6 +46,7 @@
   },
   "devDependencies": {
     "browserify": "^16.0.0",
+    "dtslint": "^3.0.0",
     "nyc": "^15.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^8.0.0",
@@ -59,7 +64,8 @@
     "build": "npm run build-bundle && npm run build-mangle",
     "test-api": "node test",
     "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run generate && npm run format && npm run build && npm run test-coverage"
+    "test-types": "dtslint .",
+    "test": "npm run generate && npm run format && npm run build && npm run test-coverage && npm run test-types"
   },
   "nyc": {
     "check-coverage": true,
diff --git a/svg.d.ts b/svg.d.ts
new file mode 100644
index 0000000..b39440f
--- /dev/null
+++ b/svg.d.ts
@@ -0,0 +1,5 @@
+// TypeScript Version: 3.5
+
+import hastscript = require('hastscript')
+
+export = hastscript
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..21dda03
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "lib": ["es2015"],
+    "strict": true,
+    "baseUrl": ".",
+    "paths": {
+      "hastscript": ["index.d.ts"],
+      "hastscript/svg": ["svg.d.ts"]
+    }
+  }
+}
diff --git a/tslint.json b/tslint.json
new file mode 100644
index 0000000..70c4494
--- /dev/null
+++ b/tslint.json
@@ -0,0 +1,7 @@
+{
+  "extends": "dtslint/dtslint.json",
+  "rules": {
+    "semicolon": false,
+    "whitespace": false
+  }
+}