diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..b19abaa
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,20 @@
+// Type definitions for detect.js
+export as namespace detect
+export function parse(userAgent: string): IUserAgent
+export interface IUserAgentProps {
+  family: string
+  name: string
+  version: string
+  major?: number
+  minor?: number
+  patch?: number
+}
+export interface IDevice extends IUserAgentProps {
+  type: string
+  manufacturer: string
+}
+export interface IUserAgent {
+  browser: IUserAgentProps
+  device: IDevice
+  os: IUserAgentProps
+}