diff --git a/book/src/chapter_4.md b/book/src/chapter_4.md
index 58e8a24274cfcddbb819b9a067e568d648e5b792..ca37a2158c5165544c6434bde40533be8c01b641 100644
--- a/book/src/chapter_4.md
+++ b/book/src/chapter_4.md
@@ -1,4 +1,4 @@
-# Chapter 3 - State
+# Chapter 4 - State
 State is data that is directly associated with a particular widget. State persists during re-renders, but will be destroyed when an widget is despawned.
 
 State can be created in Kayak easily, here is an example: