diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..0eb974b
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,4 @@
+export default class TaskListsElement extends HTMLElement {
+  disabled: boolean
+  sortable: boolean
+}
diff --git a/package.json b/package.json
index 7529ea7..6e58f59 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "repository": "github/task-lists-element",
   "main": "dist/index.umd.js",
   "module": "dist/index.esm.js",
+  "types": "index.d.ts",
   "scripts": {
     "clean": "rm -rf dist",
     "lint": "github-lint",
@@ -20,7 +21,8 @@
   ],
   "license": "MIT",
   "files": [
-    "dist"
+    "dist",
+    "index.d.ts"
   ],
   "devDependencies": {
     "@babel/core": "^7.4.5",