diff --git a/lib/ttt.d.ts b/lib/ttt.d.ts
new file mode 100644
index 00000000..8a761034
--- /dev/null
+++ b/lib/ttt.d.ts
@@ -0,0 +1,15 @@
+export declare class TicTacToe {
+    /* X PlayerName */
+    playerX: string;
+    /* Y PlayerName */
+    playerY: string;
+    /* X if true, Y if false  */
+    _currentTurn: boolean;
+    _x: number;
+    _y: number;
+    _turns: number;
+    constructor(playerX: string, playerY: string);
+    get board(): number;
+    turn(player, index: number): boolean;
+    turn(player, x: number, y: number): boolean;
+}