diff --git a/src/samples/tic-tac-toe.ts b/src/samples/tic-tac-toe.ts
index a6c9649..4ea5b49 100644
--- a/src/samples/tic-tac-toe.ts
+++ b/src/samples/tic-tac-toe.ts
@@ -17,7 +17,7 @@ const WINNING_LINES: number[][][] = [
 
 export type PlayerType = 'X' | 'O';
 export type WinnerType = PlayerType | 'draw' | null;
-type TicTacToePart = Part<{ player: PlayerType }>;
+export type TicTacToePart = Part<{ player: PlayerType }>;
 
 export function createInitialState() {
     return {