diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..2dadf14
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,21 @@
+declare class ExtendedTimeElement extends HTMLElement {
+  readonly date: Date | undefined
+  getFormattedTitle(): string | undefined
+  getFormattedDate(): string | undefined
+}
+
+export class LocalTimeElement extends ExtendedTimeElement {
+  getFormattedDate(): string | undefined
+}
+
+export class RelativeTimeElement extends ExtendedTimeElement {
+  getFormattedDate(): string | undefined
+}
+
+export class TimeAgoElement extends ExtendedTimeElement {
+  getFormattedDate(): string | undefined
+}
+
+export class TimeUntilElement extends ExtendedTimeElement {
+  getFormattedDate(): string | undefined
+}
diff --git a/package.json b/package.json
index 9489888..c443a3d 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,12 @@
   "version": "3.0.5",
   "main": "dist/time-elements-legacy.js",
   "module": "dist/time-elements.js",
+  "types": "index.d.ts",
   "license": "MIT",
+  "files": [
+    "dist",
+    "index.d.ts"
+  ],
   "scripts": {
     "clean": "rm -rf dist",
     "lint": "github-lint",