diff --git a/11_1_Writing_Puzzle_Scripts.md b/11_1_Writing_Puzzle_Scripts.md
index 2a8c3e3..de4d0a6 100644
--- a/11_1_Writing_Puzzle_Scripts.md
+++ b/11_1_Writing_Puzzle_Scripts.md
@@ -1,4 +1,4 @@
- # 10.1: Writing Puzzle Scripts
+ # 11.1: Writing Puzzle Scripts
 
 > **NOTE:** This is a draft in progress, so that I can get some feedback from early reviewers. It is not yet ready for learning.