diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..43c97e7
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+package-lock=false
diff --git a/package.json b/package.json
index ee55bf8..187146e 100644
--- a/package.json
+++ b/package.json
@@ -31,12 +31,15 @@
   "author": "Eugene Sharygin <eush77@gmail.com>",
   "contributors": [
     "Eugene Sharygin <eush77@gmail.com>",
-    "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",
-    "lib/"
+    "lib/",
+    "types/index.d.ts"
   ],
+  "types": "types/index.d.ts",
   "dependencies": {
     "css-selector-parser": "^1.1.0",
     "not": "^0.1.0",
@@ -45,6 +48,7 @@
     "zwitch": "^1.0.3"
   },
   "devDependencies": {
+    "dtslint": "^0.9.9",
     "nyc": "^14.0.0",
     "prettier": "^1.0.0",
     "remark-cli": "^6.0.0",
@@ -57,7 +61,8 @@
     "format": "remark . -qfo && prettier --write \"**/*.js\" && xo --fix",
     "test-api": "node test",
     "test-coverage": "nyc --reporter lcov tape test/index.js",
-    "test": "npm run format && npm run test-coverage"
+    "test-types": "dtslint types",
+    "test": "npm run format && npm run test-coverage && npm run test-types"
   },
   "nyc": {
     "check-coverage": true,
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..7aae6cf
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,29 @@
+// TypeScript Version: 3.5
+
+import {Node} from 'unist'
+
+/**
+ * Is there a match for the given selector in the Unist tree
+ *
+ * @param selector CSS-like selector
+ * @param tree Unist node or tree of nodes to search
+ */
+declare function matches(selector: string, tree: Node): boolean
+
+/**
+ * Find first Node that matches selector
+ *
+ * @param selector CSS-like selector
+ * @param tree Unist node or tree of nodes to search
+ */
+declare function select(selector: string, tree: Node): Node | null
+
+/**
+ * Find all Nodes that match selector
+ *
+ * @param selector CSS-like selector
+ * @param tree Unist node or tree of nodes to search
+ */
+declare function selectAll(selector: string, tree: Node): Node[]
+
+export {matches, select, selectAll}
diff --git a/types/tsconfig.json b/types/tsconfig.json
new file mode 100644
index 0000000..9d2d1d3
--- /dev/null
+++ b/types/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "lib": ["es2015"],
+    "strict": true,
+    "baseUrl": ".",
+    "paths": {
+      "unist-util-select": ["index.d.ts"]
+    }
+  }
+}
diff --git a/types/tslint.json b/types/tslint.json
new file mode 100644
index 0000000..6978386
--- /dev/null
+++ b/types/tslint.json
@@ -0,0 +1,7 @@
+{
+  "extends": "dtslint/dtslint.json",
+  "rules": {
+    "whitespace": false,
+    "semicolon": false
+  }
+}
diff --git a/types/unist-util-select-tests.ts b/types/unist-util-select-tests.ts
new file mode 100644
index 0000000..85a1b7e
--- /dev/null
+++ b/types/unist-util-select-tests.ts
@@ -0,0 +1,13 @@
+import {matches, select, selectAll} from 'unist-util-select'
+
+matches() // $ExpectError
+matches('*') // $ExpectError
+matches('*', {type: 'root'}) // $ExpectType boolean
+
+select() // $ExpectError
+select('*') // $ExpectError
+select('*', {type: 'root'}) // $ExpectType Node | null
+
+selectAll() // $ExpectError
+selectAll('*') // $ExpectError
+selectAll('*', {type: 'root'}) // $ExpectType Node[]