diff --git a/13-closed-maps/README.md b/13-closed-maps/README.md
index ff71bd9..7e9cd32 100644
--- a/13-closed-maps/README.md
+++ b/13-closed-maps/README.md
@@ -1,4 +1,4 @@
-Style #12
+Style #13
 ==============================
 
 Constraints: