diff --git a/04-3d-transforms/README.md b/04-3d-transforms/README.md
index dd9e433..b1dbd57 100644
--- a/04-3d-transforms/README.md
+++ b/04-3d-transforms/README.md
@@ -1,4 +1,4 @@
-# Chapter 3: The Rendering Pipeline
+# Chapter 4: The Rendering Pipeline
 
 As I read this book, I summarize what I think is wrong. If you think my comments are wrong then please let me know. We can dicuss more and update your opinion.