diff --git a/lib/Stopwatch.d.ts b/lib/Stopwatch.d.ts
new file mode 100644
index 0000000..421675a
--- /dev/null
+++ b/lib/Stopwatch.d.ts
@@ -0,0 +1,25 @@
+declare class Stopwatch {
+    constructor(name?: string | boolean, autostart?: boolean, delta?: number);
+
+    start(): void;
+    stop(): number | null;
+    restart(): void;
+    suspend(): number | null;
+    resume(): void;
+    split(): number | null;
+    unsplit(): number | null;
+    reset(): void;
+    read(precision?: number, units?: 's' | 'ms'): number | null;
+    toString(): string;
+    prettyPrint(): void;
+
+    static STATES: {
+        INIT: string;
+        RUNNING: string;
+        STOPPED: string;
+        SPLIT: string;
+    };
+}
+
+export = Stopwatch;
+
diff --git a/package.json b/package.json
index 13c9113..80f2a9a 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "2.18.0",
   "description": "statman-stopwatch is one of the metrics from the statman library. It is a simple high res stopwatch for node.js. Stopwatch is useful for determining the amount of time it takes to perform an activity.",
   "main": "lib/Stopwatch.js",
+  "types": "Stopwatch.d.ts",
   "files": [
     "lib"
   ],