diff --git a/README.md b/README.md
index 13b8842..a986179 100644
--- a/README.md
+++ b/README.md
@@ -19,8 +19,8 @@ A growing collection of small browser games and the shared, reusable packages th
 | `mnswpr` (game core) | ✅ Built       |         |          |
 | leaderboard          | ✅ Built       |         |          |
 | move-log             | ✅ Built       |         |          |
-| replay engine        | 🚧 Development |         |          |
-| rating math          | 🔮 Planned     |         |          |
+| replay engine        | ✅ Built       |         |          |
+| rating math          | 🚧 Development |         |          |
 | `sudoku` (game core) | 🔮 Planned     |         |          |
 
 > Note: `@ayo-run/mnswpr` on npm predates this project and will be deprecated in favor of `cozy-games/mnswpr`.